Documentation

Mathlib.Order.Filter.Pointwise

Pointwise operations on filters #

This file defines pointwise operations on filters. This is useful because usual algebraic operations distribute over pointwise operations. For example,

Main declarations #

For α a semigroup/monoid, Filter α is a semigroup/monoid. As an unfortunate side effect, this means that n • f, where n : ℕ, is ambiguous between pointwise scaling and repeated pointwise addition. See note [pointwise nat action].

Implementation notes #

We put all instances in the locale Pointwise, so that these instances are not available by default. Note that we do not mark them as reducible (as argued by note [reducible non-instances]) since we expect the locale to be open whenever the instances are actually used (and making the instances reducible changes the behavior of simp).

Tags #

filter multiplication, filter addition, pointwise addition, pointwise multiplication,

0/1 as filters #

def Filter.instOne {α : Type u_2} [One α] :
One (Filter α)

1 : Filter α is defined as the filter of sets containing 1 : α in locale Pointwise.

Equations
    Instances For
      def Filter.instZero {α : Type u_2} [Zero α] :

      0 : Filter α is defined as the filter of sets containing 0 : α in locale Pointwise.

      Equations
        Instances For
          @[simp]
          theorem Filter.mem_one {α : Type u_2} [One α] {s : Set α} :
          s 1 1 s
          @[simp]
          theorem Filter.mem_zero {α : Type u_2} [Zero α] {s : Set α} :
          s 0 0 s
          theorem Filter.one_mem_one {α : Type u_2} [One α] :
          1 1
          theorem Filter.zero_mem_zero {α : Type u_2} [Zero α] :
          0 0
          @[simp]
          theorem Filter.pure_one {α : Type u_2} [One α] :
          pure 1 = 1
          @[simp]
          theorem Filter.pure_zero {α : Type u_2} [Zero α] :
          pure 0 = 0
          @[simp]
          theorem Filter.one_prod {α : Type u_2} {β : Type u_3} [One α] {l : Filter β} :
          1 ×ˢ l = map (fun (x : β) => (1, x)) l
          @[simp]
          theorem Filter.zero_prod {α : Type u_2} {β : Type u_3} [Zero α] {l : Filter β} :
          0 ×ˢ l = map (fun (x : β) => (0, x)) l
          @[simp]
          theorem Filter.prod_one {α : Type u_2} {β : Type u_3} [One α] {l : Filter β} :
          l ×ˢ 1 = map (fun (x : β) => (x, 1)) l
          @[simp]
          theorem Filter.prod_zero {α : Type u_2} {β : Type u_3} [Zero α] {l : Filter β} :
          l ×ˢ 0 = map (fun (x : β) => (x, 0)) l
          @[simp]
          theorem Filter.principal_one {α : Type u_2} [One α] :
          @[simp]
          theorem Filter.principal_zero {α : Type u_2} [Zero α] :
          theorem Filter.one_neBot {α : Type u_2} [One α] :
          theorem Filter.zero_neBot {α : Type u_2} [Zero α] :
          @[simp]
          theorem Filter.map_one' {α : Type u_2} {β : Type u_3} [One α] (f : αβ) :
          map f 1 = pure (f 1)
          @[simp]
          theorem Filter.map_zero' {α : Type u_2} {β : Type u_3} [Zero α] (f : αβ) :
          map f 0 = pure (f 0)
          @[simp]
          theorem Filter.le_one_iff {α : Type u_2} [One α] {f : Filter α} :
          f 1 1 f
          @[simp]
          theorem Filter.nonpos_iff {α : Type u_2} [Zero α] {f : Filter α} :
          f 0 0 f
          theorem Filter.NeBot.le_one_iff {α : Type u_2} [One α] {f : Filter α} (h : f.NeBot) :
          f 1 f = 1
          theorem Filter.NeBot.nonpos_iff {α : Type u_2} [Zero α] {f : Filter α} (h : f.NeBot) :
          f 0 f = 0
          @[simp]
          theorem Filter.eventually_one {α : Type u_2} [One α] {p : αProp} :
          (∀ᶠ (x : α) in 1, p x) p 1
          @[simp]
          theorem Filter.eventually_zero {α : Type u_2} [Zero α] {p : αProp} :
          (∀ᶠ (x : α) in 0, p x) p 0
          @[simp]
          theorem Filter.tendsto_one {α : Type u_2} {β : Type u_3} [One α] {a : Filter β} {f : βα} :
          Tendsto f a 1 ∀ᶠ (x : β) in a, f x = 1
          @[simp]
          theorem Filter.tendsto_zero {α : Type u_2} {β : Type u_3} [Zero α] {a : Filter β} {f : βα} :
          Tendsto f a 0 ∀ᶠ (x : β) in a, f x = 0
          theorem Filter.one_prod_one {α : Type u_2} {β : Type u_3} [One α] [One β] :
          1 ×ˢ 1 = 1
          theorem Filter.zero_prod_zero {α : Type u_2} {β : Type u_3} [Zero α] [Zero β] :
          0 ×ˢ 0 = 0
          def Filter.pureOneHom {α : Type u_2} [One α] :
          OneHom α (Filter α)

          pure as a OneHom.

          Equations
            Instances For
              def Filter.pureZeroHom {α : Type u_2} [Zero α] :
              ZeroHom α (Filter α)

              pure as a ZeroHom.

              Equations
                Instances For
                  @[simp]
                  theorem Filter.coe_pureOneHom {α : Type u_2} [One α] :
                  @[simp]
                  theorem Filter.coe_pureZeroHom {α : Type u_2} [Zero α] :
                  @[simp]
                  theorem Filter.pureOneHom_apply {α : Type u_2} [One α] (a : α) :
                  @[simp]
                  theorem Filter.pureZeroHom_apply {α : Type u_2} [Zero α] (a : α) :
                  theorem Filter.map_one {F : Type u_1} {α : Type u_2} {β : Type u_3} [One α] [One β] [FunLike F α β] [OneHomClass F α β] (φ : F) :
                  map (⇑φ) 1 = 1
                  theorem Filter.map_zero {F : Type u_1} {α : Type u_2} {β : Type u_3} [Zero α] [Zero β] [FunLike F α β] [ZeroHomClass F α β] (φ : F) :
                  map (⇑φ) 0 = 0

                  Filter negation/inversion #

                  instance Filter.instInv {α : Type u_2} [Inv α] :
                  Inv (Filter α)

                  The inverse of a filter is the pointwise preimage under ⁻¹ of its sets.

                  Equations
                    instance Filter.instNeg {α : Type u_2} [Neg α] :
                    Neg (Filter α)

                    The negation of a filter is the pointwise preimage under - of its sets.

                    Equations
                      @[simp]
                      theorem Filter.map_inv {α : Type u_2} [Inv α] {f : Filter α} :
                      @[simp]
                      theorem Filter.map_neg {α : Type u_2} [Neg α] {f : Filter α} :
                      theorem Filter.mem_inv {α : Type u_2} [Inv α] {f : Filter α} {s : Set α} :
                      theorem Filter.mem_neg {α : Type u_2} [Neg α] {f : Filter α} {s : Set α} :
                      theorem Filter.inv_le_inv {α : Type u_2} [Inv α] {f g : Filter α} (hf : f g) :
                      theorem Filter.neg_le_neg {α : Type u_2} [Neg α] {f g : Filter α} (hf : f g) :
                      -f -g
                      @[simp]
                      theorem Filter.inv_pure {α : Type u_2} [Inv α] {a : α} :
                      @[simp]
                      theorem Filter.neg_pure {α : Type u_2} [Neg α] {a : α} :
                      -pure a = pure (-a)
                      @[simp]
                      theorem Filter.inv_eq_bot_iff {α : Type u_2} [Inv α] {f : Filter α} :
                      @[simp]
                      theorem Filter.neg_eq_bot_iff {α : Type u_2} [Neg α] {f : Filter α} :
                      -f = f =
                      @[simp]
                      theorem Filter.neBot_inv_iff {α : Type u_2} [Inv α] {f : Filter α} :
                      @[simp]
                      theorem Filter.neBot_neg_iff {α : Type u_2} [Neg α] {f : Filter α} :
                      theorem Filter.NeBot.inv {α : Type u_2} [Inv α] {f : Filter α} :
                      theorem Filter.NeBot.neg {α : Type u_2} [Neg α] {f : Filter α} :
                      f.NeBot(-f).NeBot
                      theorem Filter.inv.instNeBot {α : Type u_2} [Inv α] {f : Filter α} [f.NeBot] :
                      theorem Filter.neg.instNeBot {α : Type u_2} [Neg α] {f : Filter α} [f.NeBot] :
                      (-f).NeBot
                      @[simp]
                      theorem Filter.comap_inv {α : Type u_2} [InvolutiveInv α] {f : Filter α} :
                      @[simp]
                      theorem Filter.comap_neg {α : Type u_2} [InvolutiveNeg α] {f : Filter α} :
                      theorem Filter.inv_mem_inv {α : Type u_2} [InvolutiveInv α] {f : Filter α} {s : Set α} (hs : s f) :
                      theorem Filter.neg_mem_neg {α : Type u_2} [InvolutiveNeg α] {f : Filter α} {s : Set α} (hs : s f) :
                      -s -f

                      Inversion is involutive on Filter α if it is on α.

                      Equations
                        Instances For

                          Negation is involutive on Filter α if it is on α.

                          Equations
                            Instances For
                              @[simp]
                              theorem Filter.inv_le_inv_iff {α : Type u_2} [InvolutiveInv α] {f g : Filter α} :
                              @[simp]
                              theorem Filter.neg_le_neg_iff {α : Type u_2} [InvolutiveNeg α] {f g : Filter α} :
                              -f -g f g
                              theorem Filter.inv_le_iff_le_inv {α : Type u_2} [InvolutiveInv α] {f g : Filter α} :
                              theorem Filter.neg_le_iff_le_neg {α : Type u_2} [InvolutiveNeg α] {f g : Filter α} :
                              -f g f -g
                              @[simp]
                              theorem Filter.inv_le_self {α : Type u_2} [InvolutiveInv α] {f : Filter α} :
                              @[simp]
                              theorem Filter.neg_le_self {α : Type u_2} [InvolutiveNeg α] {f : Filter α} :
                              -f f -f = f

                              Filter addition/multiplication #

                              def Filter.instMul {α : Type u_2} [Mul α] :
                              Mul (Filter α)

                              The filter f * g is generated by {s * t | s ∈ f, t ∈ g} in locale Pointwise.

                              Equations
                                Instances For
                                  def Filter.instAdd {α : Type u_2} [Add α] :
                                  Add (Filter α)

                                  The filter f + g is generated by {s + t | s ∈ f, t ∈ g} in locale Pointwise.

                                  Equations
                                    Instances For
                                      @[simp]
                                      theorem Filter.map₂_mul {α : Type u_2} [Mul α] {f g : Filter α} :
                                      map₂ (fun (x1 x2 : α) => x1 * x2) f g = f * g
                                      @[simp]
                                      theorem Filter.map₂_add {α : Type u_2} [Add α] {f g : Filter α} :
                                      map₂ (fun (x1 x2 : α) => x1 + x2) f g = f + g
                                      theorem Filter.mem_mul {α : Type u_2} [Mul α] {f g : Filter α} {s : Set α} :
                                      s f * g t₁f, t₂g, t₁ * t₂ s
                                      theorem Filter.mem_add {α : Type u_2} [Add α] {f g : Filter α} {s : Set α} :
                                      s f + g t₁f, t₂g, t₁ + t₂ s
                                      theorem Filter.mul_mem_mul {α : Type u_2} [Mul α] {f g : Filter α} {s t : Set α} :
                                      s ft gs * t f * g
                                      theorem Filter.add_mem_add {α : Type u_2} [Add α] {f g : Filter α} {s t : Set α} :
                                      s ft gs + t f + g
                                      @[simp]
                                      theorem Filter.bot_mul {α : Type u_2} [Mul α] {g : Filter α} :
                                      @[simp]
                                      theorem Filter.bot_add {α : Type u_2} [Add α] {g : Filter α} :
                                      @[simp]
                                      theorem Filter.mul_bot {α : Type u_2} [Mul α] {f : Filter α} :
                                      @[simp]
                                      theorem Filter.add_bot {α : Type u_2} [Add α] {f : Filter α} :
                                      @[simp]
                                      theorem Filter.mul_eq_bot_iff {α : Type u_2} [Mul α] {f g : Filter α} :
                                      f * g = f = g =
                                      @[simp]
                                      theorem Filter.add_eq_bot_iff {α : Type u_2} [Add α] {f g : Filter α} :
                                      f + g = f = g =
                                      @[simp]
                                      theorem Filter.mul_neBot_iff {α : Type u_2} [Mul α] {f g : Filter α} :
                                      (f * g).NeBot f.NeBot g.NeBot
                                      @[simp]
                                      theorem Filter.add_neBot_iff {α : Type u_2} [Add α] {f g : Filter α} :
                                      (f + g).NeBot f.NeBot g.NeBot
                                      theorem Filter.NeBot.mul {α : Type u_2} [Mul α] {f g : Filter α} :
                                      f.NeBotg.NeBot(f * g).NeBot
                                      theorem Filter.NeBot.add {α : Type u_2} [Add α] {f g : Filter α} :
                                      f.NeBotg.NeBot(f + g).NeBot
                                      theorem Filter.NeBot.of_mul_left {α : Type u_2} [Mul α] {f g : Filter α} :
                                      (f * g).NeBotf.NeBot
                                      theorem Filter.NeBot.of_add_left {α : Type u_2} [Add α] {f g : Filter α} :
                                      (f + g).NeBotf.NeBot
                                      theorem Filter.NeBot.of_mul_right {α : Type u_2} [Mul α] {f g : Filter α} :
                                      (f * g).NeBotg.NeBot
                                      theorem Filter.NeBot.of_add_right {α : Type u_2} [Add α] {f g : Filter α} :
                                      (f + g).NeBotg.NeBot
                                      theorem Filter.mul.instNeBot {α : Type u_2} [Mul α] {f g : Filter α} [f.NeBot] [g.NeBot] :
                                      (f * g).NeBot
                                      theorem Filter.add.instNeBot {α : Type u_2} [Add α] {f g : Filter α} [f.NeBot] [g.NeBot] :
                                      (f + g).NeBot
                                      @[simp]
                                      theorem Filter.pure_mul {α : Type u_2} [Mul α] {g : Filter α} {a : α} :
                                      pure a * g = map (fun (x : α) => a * x) g
                                      @[simp]
                                      theorem Filter.pure_add {α : Type u_2} [Add α] {g : Filter α} {a : α} :
                                      pure a + g = map (fun (x : α) => a + x) g
                                      @[simp]
                                      theorem Filter.mul_pure {α : Type u_2} [Mul α] {f : Filter α} {b : α} :
                                      f * pure b = map (fun (x : α) => x * b) f
                                      @[simp]
                                      theorem Filter.add_pure {α : Type u_2} [Add α] {f : Filter α} {b : α} :
                                      f + pure b = map (fun (x : α) => x + b) f
                                      theorem Filter.pure_mul_pure {α : Type u_2} [Mul α] {a b : α} :
                                      pure a * pure b = pure (a * b)
                                      theorem Filter.pure_add_pure {α : Type u_2} [Add α] {a b : α} :
                                      pure a + pure b = pure (a + b)
                                      @[simp]
                                      theorem Filter.le_mul_iff {α : Type u_2} [Mul α] {f g h : Filter α} :
                                      h f * g ∀ ⦃s : Set α⦄, s f∀ ⦃t : Set α⦄, t gs * t h
                                      @[simp]
                                      theorem Filter.le_add_iff {α : Type u_2} [Add α] {f g h : Filter α} :
                                      h f + g ∀ ⦃s : Set α⦄, s f∀ ⦃t : Set α⦄, t gs + t h
                                      instance Filter.mulLeftMono {α : Type u_2} [Mul α] :
                                      instance Filter.addLeftMono {α : Type u_2} [Add α] :
                                      instance Filter.mulRightMono {α : Type u_2} [Mul α] :
                                      instance Filter.addRightMono {α : Type u_2} [Add α] :
                                      theorem Filter.map_mul {F : Type u_1} {α : Type u_2} {β : Type u_3} [Mul α] [Mul β] {f₁ f₂ : Filter α} [FunLike F α β] [MulHomClass F α β] (m : F) :
                                      map (⇑m) (f₁ * f₂) = map (⇑m) f₁ * map (⇑m) f₂
                                      theorem Filter.map_add {F : Type u_1} {α : Type u_2} {β : Type u_3} [Add α] [Add β] {f₁ f₂ : Filter α} [FunLike F α β] [AddHomClass F α β] (m : F) :
                                      map (⇑m) (f₁ + f₂) = map (⇑m) f₁ + map (⇑m) f₂
                                      def Filter.pureMulHom {α : Type u_2} [Mul α] :

                                      pure operation as a MulHom.

                                      Equations
                                        Instances For
                                          def Filter.pureAddHom {α : Type u_2} [Add α] :

                                          The singleton operation as an AddHom.

                                          Equations
                                            Instances For
                                              @[simp]
                                              theorem Filter.coe_pureMulHom {α : Type u_2} [Mul α] :
                                              @[simp]
                                              theorem Filter.coe_pureAddHom {α : Type u_2} [Add α] :
                                              @[simp]
                                              theorem Filter.pureMulHom_apply {α : Type u_2} [Mul α] (a : α) :
                                              @[simp]
                                              theorem Filter.pureAddHom_apply {α : Type u_2} [Add α] (a : α) :

                                              Filter subtraction/division #

                                              def Filter.instDiv {α : Type u_2} [Div α] :
                                              Div (Filter α)

                                              The filter f / g is generated by {s / t | s ∈ f, t ∈ g} in locale Pointwise.

                                              Equations
                                                Instances For
                                                  def Filter.instSub {α : Type u_2} [Sub α] :
                                                  Sub (Filter α)

                                                  The filter f - g is generated by {s - t | s ∈ f, t ∈ g} in locale Pointwise.

                                                  Equations
                                                    Instances For
                                                      @[simp]
                                                      theorem Filter.map₂_div {α : Type u_2} [Div α] {f g : Filter α} :
                                                      map₂ (fun (x1 x2 : α) => x1 / x2) f g = f / g
                                                      @[simp]
                                                      theorem Filter.map₂_sub {α : Type u_2} [Sub α] {f g : Filter α} :
                                                      map₂ (fun (x1 x2 : α) => x1 - x2) f g = f - g
                                                      theorem Filter.mem_div {α : Type u_2} [Div α] {f g : Filter α} {s : Set α} :
                                                      s f / g t₁f, t₂g, t₁ / t₂ s
                                                      theorem Filter.mem_sub {α : Type u_2} [Sub α] {f g : Filter α} {s : Set α} :
                                                      s f - g t₁f, t₂g, t₁ - t₂ s
                                                      theorem Filter.div_mem_div {α : Type u_2} [Div α] {f g : Filter α} {s t : Set α} :
                                                      s ft gs / t f / g
                                                      theorem Filter.sub_mem_sub {α : Type u_2} [Sub α] {f g : Filter α} {s t : Set α} :
                                                      s ft gs - t f - g
                                                      @[simp]
                                                      theorem Filter.bot_div {α : Type u_2} [Div α] {g : Filter α} :
                                                      @[simp]
                                                      theorem Filter.bot_sub {α : Type u_2} [Sub α] {g : Filter α} :
                                                      @[simp]
                                                      theorem Filter.div_bot {α : Type u_2} [Div α] {f : Filter α} :
                                                      @[simp]
                                                      theorem Filter.sub_bot {α : Type u_2} [Sub α] {f : Filter α} :
                                                      @[simp]
                                                      theorem Filter.div_eq_bot_iff {α : Type u_2} [Div α] {f g : Filter α} :
                                                      f / g = f = g =
                                                      @[simp]
                                                      theorem Filter.sub_eq_bot_iff {α : Type u_2} [Sub α] {f g : Filter α} :
                                                      f - g = f = g =
                                                      @[simp]
                                                      theorem Filter.div_neBot_iff {α : Type u_2} [Div α] {f g : Filter α} :
                                                      (f / g).NeBot f.NeBot g.NeBot
                                                      @[simp]
                                                      theorem Filter.sub_neBot_iff {α : Type u_2} [Sub α] {f g : Filter α} :
                                                      (f - g).NeBot f.NeBot g.NeBot
                                                      theorem Filter.NeBot.div {α : Type u_2} [Div α] {f g : Filter α} :
                                                      f.NeBotg.NeBot(f / g).NeBot
                                                      theorem Filter.NeBot.sub {α : Type u_2} [Sub α] {f g : Filter α} :
                                                      f.NeBotg.NeBot(f - g).NeBot
                                                      theorem Filter.NeBot.of_div_left {α : Type u_2} [Div α] {f g : Filter α} :
                                                      (f / g).NeBotf.NeBot
                                                      theorem Filter.NeBot.of_sub_left {α : Type u_2} [Sub α] {f g : Filter α} :
                                                      (f - g).NeBotf.NeBot
                                                      theorem Filter.NeBot.of_div_right {α : Type u_2} [Div α] {f g : Filter α} :
                                                      (f / g).NeBotg.NeBot
                                                      theorem Filter.NeBot.of_sub_right {α : Type u_2} [Sub α] {f g : Filter α} :
                                                      (f - g).NeBotg.NeBot
                                                      theorem Filter.div.instNeBot {α : Type u_2} [Div α] {f g : Filter α} [f.NeBot] [g.NeBot] :
                                                      (f / g).NeBot
                                                      theorem Filter.sub.instNeBot {α : Type u_2} [Sub α] {f g : Filter α} [f.NeBot] [g.NeBot] :
                                                      (f - g).NeBot
                                                      @[simp]
                                                      theorem Filter.pure_div {α : Type u_2} [Div α] {g : Filter α} {a : α} :
                                                      pure a / g = map (fun (x : α) => a / x) g
                                                      @[simp]
                                                      theorem Filter.pure_sub {α : Type u_2} [Sub α] {g : Filter α} {a : α} :
                                                      pure a - g = map (fun (x : α) => a - x) g
                                                      @[simp]
                                                      theorem Filter.div_pure {α : Type u_2} [Div α] {f : Filter α} {b : α} :
                                                      f / pure b = map (fun (x : α) => x / b) f
                                                      @[simp]
                                                      theorem Filter.sub_pure {α : Type u_2} [Sub α] {f : Filter α} {b : α} :
                                                      f - pure b = map (fun (x : α) => x - b) f
                                                      theorem Filter.pure_div_pure {α : Type u_2} [Div α] {a b : α} :
                                                      pure a / pure b = pure (a / b)
                                                      theorem Filter.pure_sub_pure {α : Type u_2} [Sub α] {a b : α} :
                                                      pure a - pure b = pure (a - b)
                                                      theorem Filter.div_le_div {α : Type u_2} [Div α] {f₁ f₂ g₁ g₂ : Filter α} :
                                                      f₁ f₂g₁ g₂f₁ / g₁ f₂ / g₂
                                                      theorem Filter.sub_le_sub {α : Type u_2} [Sub α] {f₁ f₂ g₁ g₂ : Filter α} :
                                                      f₁ f₂g₁ g₂f₁ - g₁ f₂ - g₂
                                                      theorem Filter.div_le_div_left {α : Type u_2} [Div α] {f g₁ g₂ : Filter α} :
                                                      g₁ g₂f / g₁ f / g₂
                                                      theorem Filter.sub_le_sub_left {α : Type u_2} [Sub α] {f g₁ g₂ : Filter α} :
                                                      g₁ g₂f - g₁ f - g₂
                                                      theorem Filter.div_le_div_right {α : Type u_2} [Div α] {f₁ f₂ g : Filter α} :
                                                      f₁ f₂f₁ / g f₂ / g
                                                      theorem Filter.sub_le_sub_right {α : Type u_2} [Sub α] {f₁ f₂ g : Filter α} :
                                                      f₁ f₂f₁ - g f₂ - g
                                                      @[simp]
                                                      theorem Filter.le_div_iff {α : Type u_2} [Div α] {f g h : Filter α} :
                                                      h f / g ∀ ⦃s : Set α⦄, s f∀ ⦃t : Set α⦄, t gs / t h
                                                      @[simp]
                                                      theorem Filter.le_sub_iff {α : Type u_2} [Sub α] {f g h : Filter α} :
                                                      h f - g ∀ ⦃s : Set α⦄, s f∀ ⦃t : Set α⦄, t gs - t h
                                                      instance Filter.covariant_div {α : Type u_2} [Div α] :
                                                      CovariantClass (Filter α) (Filter α) (fun (x1 x2 : Filter α) => x1 / x2) fun (x1 x2 : Filter α) => x1 x2
                                                      instance Filter.covariant_sub {α : Type u_2} [Sub α] :
                                                      CovariantClass (Filter α) (Filter α) (fun (x1 x2 : Filter α) => x1 - x2) fun (x1 x2 : Filter α) => x1 x2
                                                      instance Filter.covariant_swap_div {α : Type u_2} [Div α] :
                                                      CovariantClass (Filter α) (Filter α) (Function.swap fun (x1 x2 : Filter α) => x1 / x2) fun (x1 x2 : Filter α) => x1 x2
                                                      instance Filter.covariant_swap_sub {α : Type u_2} [Sub α] :
                                                      CovariantClass (Filter α) (Filter α) (Function.swap fun (x1 x2 : Filter α) => x1 - x2) fun (x1 x2 : Filter α) => x1 x2
                                                      def Filter.instNSMul {α : Type u_2} [Zero α] [Add α] :

                                                      Repeated pointwise addition (not the same as pointwise repeated addition!) of a Filter. See Note [pointwise nat action].

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                                                          def Filter.instNPow {α : Type u_2} [One α] [Mul α] :

                                                          Repeated pointwise multiplication (not the same as pointwise repeated multiplication!) of a Filter. See Note [pointwise nat action].

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                                                              def Filter.instZSMul {α : Type u_2} [Zero α] [Add α] [Neg α] :

                                                              Repeated pointwise addition/subtraction (not the same as pointwise repeated addition/subtraction!) of a Filter. See Note [pointwise nat action].

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                                                                  def Filter.instZPow {α : Type u_2} [One α] [Mul α] [Inv α] :

                                                                  Repeated pointwise multiplication/division (not the same as pointwise repeated multiplication/division!) of a Filter. See Note [pointwise nat action].

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                                                                      def Filter.semigroup {α : Type u_2} [Semigroup α] :

                                                                      Filter α is a Semigroup under pointwise operations if α is.

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                                                                          Filter α is an AddSemigroup under pointwise operations if α is.

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                                                                              Filter α is a CommSemigroup under pointwise operations if α is.

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                                                                                  Filter α is an AddCommSemigroup under pointwise operations if α is.

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                                                                                      Filter α is a MulOneClass under pointwise operations if α is.

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                                                                                          Filter α is an AddZeroClass under pointwise operations if α is.

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                                                                                              def Filter.mapMonoidHom {F : Type u_1} {α : Type u_2} {β : Type u_3} [MulOneClass α] [MulOneClass β] [FunLike F α β] [MonoidHomClass F α β] (φ : F) :

                                                                                              If φ : α →* β then mapMonoidHom φ is the monoid homomorphism Filter α →* Filter β induced by map φ.

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                                                                                                  def Filter.mapAddMonoidHom {F : Type u_1} {α : Type u_2} {β : Type u_3} [AddZeroClass α] [AddZeroClass β] [FunLike F α β] [AddMonoidHomClass F α β] (φ : F) :

                                                                                                  If φ : α →+ β then mapAddMonoidHom φ is the monoid homomorphism Filter α →+ Filter β induced by map φ.

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                                                                                                      theorem Filter.comap_mul_comap_le {F : Type u_1} {α : Type u_2} {β : Type u_3} [MulOneClass α] [MulOneClass β] [FunLike F α β] [MulHomClass F α β] (m : F) {f g : Filter β} :
                                                                                                      comap (⇑m) f * comap (⇑m) g comap (⇑m) (f * g)
                                                                                                      theorem Filter.comap_add_comap_le {F : Type u_1} {α : Type u_2} {β : Type u_3} [AddZeroClass α] [AddZeroClass β] [FunLike F α β] [AddHomClass F α β] (m : F) {f g : Filter β} :
                                                                                                      comap (⇑m) f + comap (⇑m) g comap (⇑m) (f + g)
                                                                                                      theorem Filter.Tendsto.mul_mul {F : Type u_1} {α : Type u_2} {β : Type u_3} [MulOneClass α] [MulOneClass β] [FunLike F α β] [MulHomClass F α β] (m : F) {f₁ g₁ : Filter α} {f₂ g₂ : Filter β} :
                                                                                                      Tendsto (⇑m) f₁ f₂Tendsto (⇑m) g₁ g₂Tendsto (⇑m) (f₁ * g₁) (f₂ * g₂)
                                                                                                      theorem Filter.Tendsto.add_add {F : Type u_1} {α : Type u_2} {β : Type u_3} [AddZeroClass α] [AddZeroClass β] [FunLike F α β] [AddHomClass F α β] (m : F) {f₁ g₁ : Filter α} {f₂ g₂ : Filter β} :
                                                                                                      Tendsto (⇑m) f₁ f₂Tendsto (⇑m) g₁ g₂Tendsto (⇑m) (f₁ + g₁) (f₂ + g₂)
                                                                                                      def Filter.pureMonoidHom {α : Type u_2} [MulOneClass α] :
                                                                                                      α →* Filter α

                                                                                                      pure as a MonoidHom.

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                                                                                                          pure as an AddMonoidHom.

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                                                                                                              @[simp]
                                                                                                              theorem Filter.pureMonoidHom_apply {α : Type u_2} [MulOneClass α] (a : α) :
                                                                                                              @[simp]
                                                                                                              def Filter.monoid {α : Type u_2} [Monoid α] :

                                                                                                              Filter α is a Monoid under pointwise operations if α is.

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                                                                                                                  def Filter.addMonoid {α : Type u_2} [AddMonoid α] :

                                                                                                                  Filter α is an AddMonoid under pointwise operations if α is.

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                                                                                                                      theorem Filter.pow_mem_pow {α : Type u_2} [Monoid α] {f : Filter α} {s : Set α} (hs : s f) (n : ) :
                                                                                                                      s ^ n f ^ n
                                                                                                                      theorem Filter.nsmul_mem_nsmul {α : Type u_2} [AddMonoid α] {f : Filter α} {s : Set α} (hs : s f) (n : ) :
                                                                                                                      n s n f
                                                                                                                      @[simp]
                                                                                                                      theorem Filter.bot_pow {α : Type u_2} [Monoid α] {n : } (hn : n 0) :
                                                                                                                      @[simp]
                                                                                                                      theorem Filter.nsmul_bot {α : Type u_2} [AddMonoid α] {n : } (hn : n 0) :
                                                                                                                      theorem Filter.mul_top_of_one_le {α : Type u_2} [Monoid α] {f : Filter α} (hf : 1 f) :
                                                                                                                      theorem Filter.add_top_of_nonneg {α : Type u_2} [AddMonoid α] {f : Filter α} (hf : 0 f) :
                                                                                                                      theorem Filter.top_mul_of_one_le {α : Type u_2} [Monoid α] {f : Filter α} (hf : 1 f) :
                                                                                                                      theorem Filter.top_add_of_nonneg {α : Type u_2} [AddMonoid α] {f : Filter α} (hf : 0 f) :
                                                                                                                      @[simp]
                                                                                                                      theorem Filter.top_mul_top {α : Type u_2} [Monoid α] :
                                                                                                                      @[simp]
                                                                                                                      theorem Filter.top_add_top {α : Type u_2} [AddMonoid α] :
                                                                                                                      theorem Filter.top_pow {α : Type u_2} [Monoid α] {n : } :
                                                                                                                      n 0 ^ n =
                                                                                                                      theorem Filter.nsmul_top {α : Type u_2} [AddMonoid α] {n : } :
                                                                                                                      n 0n =
                                                                                                                      theorem IsUnit.filter {α : Type u_2} [Monoid α] {a : α} :
                                                                                                                      IsUnit aIsUnit (pure a)
                                                                                                                      theorem IsAddUnit.filter {α : Type u_2} [AddMonoid α] {a : α} :

                                                                                                                      Filter α is a CommMonoid under pointwise operations if α is.

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                                                                                                                          Filter α is an AddCommMonoid under pointwise operations if α is.

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                                                                                                                              theorem Filter.mul_eq_one_iff {α : Type u_2} [DivisionMonoid α] {f g : Filter α} :
                                                                                                                              f * g = 1 ∃ (a : α) (b : α), f = pure a g = pure b a * b = 1
                                                                                                                              theorem Filter.add_eq_zero_iff {α : Type u_2} [SubtractionMonoid α] {f g : Filter α} :
                                                                                                                              f + g = 0 ∃ (a : α) (b : α), f = pure a g = pure b a + b = 0

                                                                                                                              Filter α is a division monoid under pointwise operations if α is.

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                                                                                                                                  Filter α is a subtraction monoid under pointwise operations if α is.

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                                                                                                                                      theorem Filter.isUnit_iff {α : Type u_2} [DivisionMonoid α] {f : Filter α} :
                                                                                                                                      IsUnit f ∃ (a : α), f = pure a IsUnit a
                                                                                                                                      theorem Filter.isAddUnit_iff {α : Type u_2} [SubtractionMonoid α] {f : Filter α} :
                                                                                                                                      IsAddUnit f ∃ (a : α), f = pure a IsAddUnit a

                                                                                                                                      Filter α is a commutative division monoid under pointwise operations if α is.

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                                                                                                                                          Filter α is a commutative subtraction monoid under pointwise operations if α is.

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                                                                                                                                              Filter α has distributive negation if α has.

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                                                                                                                                                  Note that Filter α is not a Distrib because f * g + f * h has cross terms that f * (g + h) lacks.

                                                                                                                                                  theorem Filter.mul_add_subset {α : Type u_2} [Distrib α] {f g h : Filter α} :
                                                                                                                                                  f * (g + h) f * g + f * h
                                                                                                                                                  theorem Filter.add_mul_subset {α : Type u_2} [Distrib α] {f g h : Filter α} :
                                                                                                                                                  (f + g) * h f * h + g * h

                                                                                                                                                  Note that Filter is not a MulZeroClass because 0 * ⊥ ≠ 0.

                                                                                                                                                  theorem Filter.NeBot.mul_zero_nonneg {α : Type u_2} [MulZeroClass α] {f : Filter α} (hf : f.NeBot) :
                                                                                                                                                  0 f * 0
                                                                                                                                                  theorem Filter.NeBot.zero_mul_nonneg {α : Type u_2} [MulZeroClass α] {g : Filter α} (hg : g.NeBot) :
                                                                                                                                                  0 0 * g

                                                                                                                                                  Note that Filter α is not a group because f / f ≠ 1 in general

                                                                                                                                                  @[simp]
                                                                                                                                                  theorem Filter.one_le_div_iff {α : Type u_2} [Group α] {f g : Filter α} :
                                                                                                                                                  1 f / g ¬Disjoint f g
                                                                                                                                                  @[simp]
                                                                                                                                                  theorem Filter.nonneg_sub_iff {α : Type u_2} [AddGroup α] {f g : Filter α} :
                                                                                                                                                  0 f - g ¬Disjoint f g
                                                                                                                                                  theorem Filter.not_one_le_div_iff {α : Type u_2} [Group α] {f g : Filter α} :
                                                                                                                                                  ¬1 f / g Disjoint f g
                                                                                                                                                  theorem Filter.not_nonneg_sub_iff {α : Type u_2} [AddGroup α] {f g : Filter α} :
                                                                                                                                                  ¬0 f - g Disjoint f g
                                                                                                                                                  theorem Filter.NeBot.one_le_div {α : Type u_2} [Group α] {f : Filter α} (h : f.NeBot) :
                                                                                                                                                  1 f / f
                                                                                                                                                  theorem Filter.NeBot.nonneg_sub {α : Type u_2} [AddGroup α] {f : Filter α} (h : f.NeBot) :
                                                                                                                                                  0 f - f
                                                                                                                                                  theorem Filter.isUnit_pure {α : Type u_2} [Group α] (a : α) :
                                                                                                                                                  theorem Filter.isAddUnit_pure {α : Type u_2} [AddGroup α] (a : α) :
                                                                                                                                                  @[simp]
                                                                                                                                                  theorem Filter.isUnit_iff_singleton {α : Type u_2} [Group α] {f : Filter α} :
                                                                                                                                                  IsUnit f ∃ (a : α), f = pure a
                                                                                                                                                  theorem Filter.map_inv' {F : Type u_1} {α : Type u_2} {β : Type u_3} [Group α] [DivisionMonoid β] [FunLike F α β] [MonoidHomClass F α β] (m : F) {f : Filter α} :
                                                                                                                                                  map (⇑m) f⁻¹ = (map (⇑m) f)⁻¹
                                                                                                                                                  theorem Filter.map_neg' {F : Type u_1} {α : Type u_2} {β : Type u_3} [AddGroup α] [SubtractionMonoid β] [FunLike F α β] [AddMonoidHomClass F α β] (m : F) {f : Filter α} :
                                                                                                                                                  map (⇑m) (-f) = -map (⇑m) f
                                                                                                                                                  theorem Filter.Tendsto.inv_inv {F : Type u_1} {α : Type u_2} {β : Type u_3} [Group α] [DivisionMonoid β] [FunLike F α β] [MonoidHomClass F α β] (m : F) {f₁ : Filter α} {f₂ : Filter β} :
                                                                                                                                                  Tendsto (⇑m) f₁ f₂Tendsto (⇑m) f₁⁻¹ f₂⁻¹
                                                                                                                                                  theorem Filter.Tendsto.neg_neg {F : Type u_1} {α : Type u_2} {β : Type u_3} [AddGroup α] [SubtractionMonoid β] [FunLike F α β] [AddMonoidHomClass F α β] (m : F) {f₁ : Filter α} {f₂ : Filter β} :
                                                                                                                                                  Tendsto (⇑m) f₁ f₂Tendsto (⇑m) (-f₁) (-f₂)
                                                                                                                                                  theorem Filter.map_div {F : Type u_1} {α : Type u_2} {β : Type u_3} [Group α] [DivisionMonoid β] [FunLike F α β] [MonoidHomClass F α β] (m : F) {f g : Filter α} :
                                                                                                                                                  map (⇑m) (f / g) = map (⇑m) f / map (⇑m) g
                                                                                                                                                  theorem Filter.map_sub {F : Type u_1} {α : Type u_2} {β : Type u_3} [AddGroup α] [SubtractionMonoid β] [FunLike F α β] [AddMonoidHomClass F α β] (m : F) {f g : Filter α} :
                                                                                                                                                  map (⇑m) (f - g) = map (⇑m) f - map (⇑m) g
                                                                                                                                                  theorem Filter.Tendsto.div_div {F : Type u_1} {α : Type u_2} {β : Type u_3} [Group α] [DivisionMonoid β] [FunLike F α β] [MonoidHomClass F α β] (m : F) {f₁ g₁ : Filter α} {f₂ g₂ : Filter β} (hf : Tendsto (⇑m) f₁ f₂) (hg : Tendsto (⇑m) g₁ g₂) :
                                                                                                                                                  Tendsto (⇑m) (f₁ / g₁) (f₂ / g₂)
                                                                                                                                                  theorem Filter.Tendsto.sub_sub {F : Type u_1} {α : Type u_2} {β : Type u_3} [AddGroup α] [SubtractionMonoid β] [FunLike F α β] [AddMonoidHomClass F α β] (m : F) {f₁ g₁ : Filter α} {f₂ g₂ : Filter β} (hf : Tendsto (⇑m) f₁ f₂) (hg : Tendsto (⇑m) g₁ g₂) :
                                                                                                                                                  Tendsto (⇑m) (f₁ - g₁) (f₂ - g₂)
                                                                                                                                                  theorem Filter.NeBot.div_zero_nonneg {α : Type u_2} [GroupWithZero α] {f : Filter α} (hf : f.NeBot) :
                                                                                                                                                  0 f / 0
                                                                                                                                                  theorem Filter.NeBot.zero_div_nonneg {α : Type u_2} [GroupWithZero α] {g : Filter α} (hg : g.NeBot) :
                                                                                                                                                  0 0 / g

                                                                                                                                                  Scalar addition/multiplication of filters #

                                                                                                                                                  def Filter.instSMul {α : Type u_2} {β : Type u_3} [SMul α β] :
                                                                                                                                                  SMul (Filter α) (Filter β)

                                                                                                                                                  The filter f • g is generated by {s • t | s ∈ f, t ∈ g} in locale Pointwise.

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                                                                                                                                                      def Filter.instVAdd {α : Type u_2} {β : Type u_3} [VAdd α β] :
                                                                                                                                                      VAdd (Filter α) (Filter β)

                                                                                                                                                      The filter f +ᵥ g is generated by {s +ᵥ t | s ∈ f, t ∈ g} in locale Pointwise.

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                                                                                                                                                          @[simp]
                                                                                                                                                          theorem Filter.map₂_smul {α : Type u_2} {β : Type u_3} [SMul α β] {f : Filter α} {g : Filter β} :
                                                                                                                                                          map₂ (fun (x1 : α) (x2 : β) => x1 x2) f g = f g
                                                                                                                                                          @[simp]
                                                                                                                                                          theorem Filter.map₂_vadd {α : Type u_2} {β : Type u_3} [VAdd α β] {f : Filter α} {g : Filter β} :
                                                                                                                                                          map₂ (fun (x1 : α) (x2 : β) => x1 +ᵥ x2) f g = f +ᵥ g
                                                                                                                                                          theorem Filter.mem_smul {α : Type u_2} {β : Type u_3} [SMul α β] {f : Filter α} {g : Filter β} {t : Set β} :
                                                                                                                                                          t f g t₁f, t₂g, t₁ t₂ t
                                                                                                                                                          theorem Filter.mem_vadd {α : Type u_2} {β : Type u_3} [VAdd α β] {f : Filter α} {g : Filter β} {t : Set β} :
                                                                                                                                                          t f +ᵥ g t₁f, t₂g, t₁ +ᵥ t₂ t
                                                                                                                                                          theorem Filter.smul_mem_smul {α : Type u_2} {β : Type u_3} [SMul α β] {f : Filter α} {g : Filter β} {s : Set α} {t : Set β} :
                                                                                                                                                          s ft gs t f g
                                                                                                                                                          theorem Filter.vadd_mem_vadd {α : Type u_2} {β : Type u_3} [VAdd α β] {f : Filter α} {g : Filter β} {s : Set α} {t : Set β} :
                                                                                                                                                          s ft gs +ᵥ t f +ᵥ g
                                                                                                                                                          @[simp]
                                                                                                                                                          theorem Filter.bot_smul {α : Type u_2} {β : Type u_3} [SMul α β] {g : Filter β} :
                                                                                                                                                          @[simp]
                                                                                                                                                          theorem Filter.bot_vadd {α : Type u_2} {β : Type u_3} [VAdd α β] {g : Filter β} :
                                                                                                                                                          @[simp]
                                                                                                                                                          theorem Filter.smul_bot {α : Type u_2} {β : Type u_3} [SMul α β] {f : Filter α} :
                                                                                                                                                          @[simp]
                                                                                                                                                          theorem Filter.vadd_bot {α : Type u_2} {β : Type u_3} [VAdd α β] {f : Filter α} :
                                                                                                                                                          @[simp]
                                                                                                                                                          theorem Filter.smul_eq_bot_iff {α : Type u_2} {β : Type u_3} [SMul α β] {f : Filter α} {g : Filter β} :
                                                                                                                                                          f g = f = g =
                                                                                                                                                          @[simp]
                                                                                                                                                          theorem Filter.vadd_eq_bot_iff {α : Type u_2} {β : Type u_3} [VAdd α β] {f : Filter α} {g : Filter β} :
                                                                                                                                                          f +ᵥ g = f = g =
                                                                                                                                                          @[simp]
                                                                                                                                                          theorem Filter.smul_neBot_iff {α : Type u_2} {β : Type u_3} [SMul α β] {f : Filter α} {g : Filter β} :
                                                                                                                                                          @[simp]
                                                                                                                                                          theorem Filter.vadd_neBot_iff {α : Type u_2} {β : Type u_3} [VAdd α β] {f : Filter α} {g : Filter β} :
                                                                                                                                                          theorem Filter.NeBot.smul {α : Type u_2} {β : Type u_3} [SMul α β] {f : Filter α} {g : Filter β} :
                                                                                                                                                          f.NeBotg.NeBot(f g).NeBot
                                                                                                                                                          theorem Filter.NeBot.vadd {α : Type u_2} {β : Type u_3} [VAdd α β] {f : Filter α} {g : Filter β} :
                                                                                                                                                          f.NeBotg.NeBot(f +ᵥ g).NeBot
                                                                                                                                                          theorem Filter.NeBot.of_smul_left {α : Type u_2} {β : Type u_3} [SMul α β] {f : Filter α} {g : Filter β} :
                                                                                                                                                          (f g).NeBotf.NeBot
                                                                                                                                                          theorem Filter.NeBot.of_vadd_left {α : Type u_2} {β : Type u_3} [VAdd α β] {f : Filter α} {g : Filter β} :
                                                                                                                                                          (f +ᵥ g).NeBotf.NeBot
                                                                                                                                                          theorem Filter.NeBot.of_smul_right {α : Type u_2} {β : Type u_3} [SMul α β] {f : Filter α} {g : Filter β} :
                                                                                                                                                          (f g).NeBotg.NeBot
                                                                                                                                                          theorem Filter.NeBot.of_vadd_right {α : Type u_2} {β : Type u_3} [VAdd α β] {f : Filter α} {g : Filter β} :
                                                                                                                                                          (f +ᵥ g).NeBotg.NeBot
                                                                                                                                                          theorem Filter.smul.instNeBot {α : Type u_2} {β : Type u_3} [SMul α β] {f : Filter α} {g : Filter β} [f.NeBot] [g.NeBot] :
                                                                                                                                                          (f g).NeBot
                                                                                                                                                          theorem Filter.vadd.instNeBot {α : Type u_2} {β : Type u_3} [VAdd α β] {f : Filter α} {g : Filter β} [f.NeBot] [g.NeBot] :
                                                                                                                                                          (f +ᵥ g).NeBot
                                                                                                                                                          @[simp]
                                                                                                                                                          theorem Filter.pure_smul {α : Type u_2} {β : Type u_3} [SMul α β] {g : Filter β} {a : α} :
                                                                                                                                                          pure a g = map (fun (x : β) => a x) g
                                                                                                                                                          @[simp]
                                                                                                                                                          theorem Filter.pure_vadd {α : Type u_2} {β : Type u_3} [VAdd α β] {g : Filter β} {a : α} :
                                                                                                                                                          pure a +ᵥ g = map (fun (x : β) => a +ᵥ x) g
                                                                                                                                                          @[simp]
                                                                                                                                                          theorem Filter.smul_pure {α : Type u_2} {β : Type u_3} [SMul α β] {f : Filter α} {b : β} :
                                                                                                                                                          f pure b = map (fun (x : α) => x b) f
                                                                                                                                                          @[simp]
                                                                                                                                                          theorem Filter.vadd_pure {α : Type u_2} {β : Type u_3} [VAdd α β] {f : Filter α} {b : β} :
                                                                                                                                                          f +ᵥ pure b = map (fun (x : α) => x +ᵥ b) f
                                                                                                                                                          theorem Filter.pure_smul_pure {α : Type u_2} {β : Type u_3} [SMul α β] {a : α} {b : β} :
                                                                                                                                                          pure a pure b = pure (a b)
                                                                                                                                                          theorem Filter.pure_vadd_pure {α : Type u_2} {β : Type u_3} [VAdd α β] {a : α} {b : β} :
                                                                                                                                                          pure a +ᵥ pure b = pure (a +ᵥ b)
                                                                                                                                                          theorem Filter.smul_le_smul {α : Type u_2} {β : Type u_3} [SMul α β] {f₁ f₂ : Filter α} {g₁ g₂ : Filter β} :
                                                                                                                                                          f₁ f₂g₁ g₂f₁ g₁ f₂ g₂
                                                                                                                                                          theorem Filter.vadd_le_vadd {α : Type u_2} {β : Type u_3} [VAdd α β] {f₁ f₂ : Filter α} {g₁ g₂ : Filter β} :
                                                                                                                                                          f₁ f₂g₁ g₂f₁ +ᵥ g₁ f₂ +ᵥ g₂
                                                                                                                                                          theorem Filter.smul_le_smul_left {α : Type u_2} {β : Type u_3} [SMul α β] {f : Filter α} {g₁ g₂ : Filter β} :
                                                                                                                                                          g₁ g₂f g₁ f g₂
                                                                                                                                                          theorem Filter.vadd_le_vadd_left {α : Type u_2} {β : Type u_3} [VAdd α β] {f : Filter α} {g₁ g₂ : Filter β} :
                                                                                                                                                          g₁ g₂f +ᵥ g₁ f +ᵥ g₂
                                                                                                                                                          theorem Filter.smul_le_smul_right {α : Type u_2} {β : Type u_3} [SMul α β] {f₁ f₂ : Filter α} {g : Filter β} :
                                                                                                                                                          f₁ f₂f₁ g f₂ g
                                                                                                                                                          theorem Filter.vadd_le_vadd_right {α : Type u_2} {β : Type u_3} [VAdd α β] {f₁ f₂ : Filter α} {g : Filter β} :
                                                                                                                                                          f₁ f₂f₁ +ᵥ g f₂ +ᵥ g
                                                                                                                                                          @[simp]
                                                                                                                                                          theorem Filter.le_smul_iff {α : Type u_2} {β : Type u_3} [SMul α β] {f : Filter α} {g h : Filter β} :
                                                                                                                                                          h f g ∀ ⦃s : Set α⦄, s f∀ ⦃t : Set β⦄, t gs t h
                                                                                                                                                          @[simp]
                                                                                                                                                          theorem Filter.le_vadd_iff {α : Type u_2} {β : Type u_3} [VAdd α β] {f : Filter α} {g h : Filter β} :
                                                                                                                                                          h f +ᵥ g ∀ ⦃s : Set α⦄, s f∀ ⦃t : Set β⦄, t gs +ᵥ t h
                                                                                                                                                          instance Filter.covariant_smul {α : Type u_2} {β : Type u_3} [SMul α β] :
                                                                                                                                                          CovariantClass (Filter α) (Filter β) (fun (x1 : Filter α) (x2 : Filter β) => x1 x2) fun (x1 x2 : Filter β) => x1 x2
                                                                                                                                                          instance Filter.covariant_vadd {α : Type u_2} {β : Type u_3} [VAdd α β] :
                                                                                                                                                          CovariantClass (Filter α) (Filter β) (fun (x1 : Filter α) (x2 : Filter β) => x1 +ᵥ x2) fun (x1 x2 : Filter β) => x1 x2

                                                                                                                                                          Scalar subtraction of filters #

                                                                                                                                                          def Filter.instVSub {α : Type u_2} {β : Type u_3} [VSub α β] :
                                                                                                                                                          VSub (Filter α) (Filter β)

                                                                                                                                                          The filter f -ᵥ g is generated by {s -ᵥ t | s ∈ f, t ∈ g} in locale Pointwise.

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                                                                                                                                                              @[simp]
                                                                                                                                                              theorem Filter.map₂_vsub {α : Type u_2} {β : Type u_3} [VSub α β] {f g : Filter β} :
                                                                                                                                                              map₂ (fun (x1 x2 : β) => x1 -ᵥ x2) f g = f -ᵥ g
                                                                                                                                                              theorem Filter.mem_vsub {α : Type u_2} {β : Type u_3} [VSub α β] {f g : Filter β} {s : Set α} :
                                                                                                                                                              s f -ᵥ g t₁f, t₂g, t₁ -ᵥ t₂ s
                                                                                                                                                              theorem Filter.vsub_mem_vsub {α : Type u_2} {β : Type u_3} [VSub α β] {f g : Filter β} {s t : Set β} :
                                                                                                                                                              s ft gs -ᵥ t f -ᵥ g
                                                                                                                                                              @[simp]
                                                                                                                                                              theorem Filter.bot_vsub {α : Type u_2} {β : Type u_3} [VSub α β] {g : Filter β} :
                                                                                                                                                              @[simp]
                                                                                                                                                              theorem Filter.vsub_bot {α : Type u_2} {β : Type u_3} [VSub α β] {f : Filter β} :
                                                                                                                                                              @[simp]
                                                                                                                                                              theorem Filter.vsub_eq_bot_iff {α : Type u_2} {β : Type u_3} [VSub α β] {f g : Filter β} :
                                                                                                                                                              f -ᵥ g = f = g =
                                                                                                                                                              @[simp]
                                                                                                                                                              theorem Filter.vsub_neBot_iff {α : Type u_2} {β : Type u_3} [VSub α β] {f g : Filter β} :
                                                                                                                                                              theorem Filter.NeBot.vsub {α : Type u_2} {β : Type u_3} [VSub α β] {f g : Filter β} :
                                                                                                                                                              f.NeBotg.NeBot(f -ᵥ g).NeBot
                                                                                                                                                              theorem Filter.NeBot.of_vsub_left {α : Type u_2} {β : Type u_3} [VSub α β] {f g : Filter β} :
                                                                                                                                                              (f -ᵥ g).NeBotf.NeBot
                                                                                                                                                              theorem Filter.NeBot.of_vsub_right {α : Type u_2} {β : Type u_3} [VSub α β] {f g : Filter β} :
                                                                                                                                                              (f -ᵥ g).NeBotg.NeBot
                                                                                                                                                              theorem Filter.vsub.instNeBot {α : Type u_2} {β : Type u_3} [VSub α β] {f g : Filter β} [f.NeBot] [g.NeBot] :
                                                                                                                                                              (f -ᵥ g).NeBot
                                                                                                                                                              @[simp]
                                                                                                                                                              theorem Filter.pure_vsub {α : Type u_2} {β : Type u_3} [VSub α β] {g : Filter β} {a : β} :
                                                                                                                                                              pure a -ᵥ g = map (fun (x : β) => a -ᵥ x) g
                                                                                                                                                              @[simp]
                                                                                                                                                              theorem Filter.vsub_pure {α : Type u_2} {β : Type u_3} [VSub α β] {f : Filter β} {b : β} :
                                                                                                                                                              f -ᵥ pure b = map (fun (x : β) => x -ᵥ b) f
                                                                                                                                                              theorem Filter.pure_vsub_pure {α : Type u_2} {β : Type u_3} [VSub α β] {a b : β} :
                                                                                                                                                              pure a -ᵥ pure b = pure (a -ᵥ b)
                                                                                                                                                              theorem Filter.vsub_le_vsub {α : Type u_2} {β : Type u_3} [VSub α β] {f₁ f₂ g₁ g₂ : Filter β} :
                                                                                                                                                              f₁ f₂g₁ g₂f₁ -ᵥ g₁ f₂ -ᵥ g₂
                                                                                                                                                              theorem Filter.vsub_le_vsub_left {α : Type u_2} {β : Type u_3} [VSub α β] {f g₁ g₂ : Filter β} :
                                                                                                                                                              g₁ g₂f -ᵥ g₁ f -ᵥ g₂
                                                                                                                                                              theorem Filter.vsub_le_vsub_right {α : Type u_2} {β : Type u_3} [VSub α β] {f₁ f₂ g : Filter β} :
                                                                                                                                                              f₁ f₂f₁ -ᵥ g f₂ -ᵥ g
                                                                                                                                                              @[simp]
                                                                                                                                                              theorem Filter.le_vsub_iff {α : Type u_2} {β : Type u_3} [VSub α β] {f g : Filter β} {h : Filter α} :
                                                                                                                                                              h f -ᵥ g ∀ ⦃s : Set β⦄, s f∀ ⦃t : Set β⦄, t gs -ᵥ t h

                                                                                                                                                              Translation/scaling of filters #

                                                                                                                                                              def Filter.instSMulFilter {α : Type u_2} {β : Type u_3} [SMul α β] :
                                                                                                                                                              SMul α (Filter β)

                                                                                                                                                              a • f is the map of f under a • in locale Pointwise.

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                                                                                                                                                                  def Filter.instVAddFilter {α : Type u_2} {β : Type u_3} [VAdd α β] :
                                                                                                                                                                  VAdd α (Filter β)

                                                                                                                                                                  a +ᵥ f is the map of f under a +ᵥ in locale Pointwise.

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                                                                                                                                                                      @[simp]
                                                                                                                                                                      theorem Filter.map_smul {α : Type u_2} {β : Type u_3} [SMul α β] {f : Filter β} {a : α} :
                                                                                                                                                                      map (fun (b : β) => a b) f = a f
                                                                                                                                                                      @[simp]
                                                                                                                                                                      theorem Filter.map_vadd {α : Type u_2} {β : Type u_3} [VAdd α β] {f : Filter β} {a : α} :
                                                                                                                                                                      map (fun (b : β) => a +ᵥ b) f = a +ᵥ f
                                                                                                                                                                      theorem Filter.mem_smul_filter {α : Type u_2} {β : Type u_3} [SMul α β] {f : Filter β} {s : Set β} {a : α} :
                                                                                                                                                                      s a f (fun (x : β) => a x) ⁻¹' s f
                                                                                                                                                                      theorem Filter.mem_vadd_filter {α : Type u_2} {β : Type u_3} [VAdd α β] {f : Filter β} {s : Set β} {a : α} :
                                                                                                                                                                      s a +ᵥ f (fun (x : β) => a +ᵥ x) ⁻¹' s f
                                                                                                                                                                      theorem Filter.smul_set_mem_smul_filter {α : Type u_2} {β : Type u_3} [SMul α β] {f : Filter β} {s : Set β} {a : α} :
                                                                                                                                                                      s fa s a f
                                                                                                                                                                      theorem Filter.vadd_set_mem_vadd_filter {α : Type u_2} {β : Type u_3} [VAdd α β] {f : Filter β} {s : Set β} {a : α} :
                                                                                                                                                                      s fa +ᵥ s a +ᵥ f
                                                                                                                                                                      @[simp]
                                                                                                                                                                      theorem Filter.smul_filter_bot {α : Type u_2} {β : Type u_3} [SMul α β] {a : α} :
                                                                                                                                                                      @[simp]
                                                                                                                                                                      theorem Filter.vadd_filter_bot {α : Type u_2} {β : Type u_3} [VAdd α β] {a : α} :
                                                                                                                                                                      @[simp]
                                                                                                                                                                      theorem Filter.smul_filter_eq_bot_iff {α : Type u_2} {β : Type u_3} [SMul α β] {f : Filter β} {a : α} :
                                                                                                                                                                      a f = f =
                                                                                                                                                                      @[simp]
                                                                                                                                                                      theorem Filter.vadd_filter_eq_bot_iff {α : Type u_2} {β : Type u_3} [VAdd α β] {f : Filter β} {a : α} :
                                                                                                                                                                      a +ᵥ f = f =
                                                                                                                                                                      @[simp]
                                                                                                                                                                      theorem Filter.smul_filter_neBot_iff {α : Type u_2} {β : Type u_3} [SMul α β] {f : Filter β} {a : α} :
                                                                                                                                                                      (a f).NeBot f.NeBot
                                                                                                                                                                      @[simp]
                                                                                                                                                                      theorem Filter.vadd_filter_neBot_iff {α : Type u_2} {β : Type u_3} [VAdd α β] {f : Filter β} {a : α} :
                                                                                                                                                                      theorem Filter.NeBot.smul_filter {α : Type u_2} {β : Type u_3} [SMul α β] {f : Filter β} {a : α} :
                                                                                                                                                                      f.NeBot(a f).NeBot
                                                                                                                                                                      theorem Filter.NeBot.vadd_filter {α : Type u_2} {β : Type u_3} [VAdd α β] {f : Filter β} {a : α} :
                                                                                                                                                                      f.NeBot(a +ᵥ f).NeBot
                                                                                                                                                                      theorem Filter.NeBot.of_smul_filter {α : Type u_2} {β : Type u_3} [SMul α β] {f : Filter β} {a : α} :
                                                                                                                                                                      (a f).NeBotf.NeBot
                                                                                                                                                                      theorem Filter.NeBot.of_vadd_filter {α : Type u_2} {β : Type u_3} [VAdd α β] {f : Filter β} {a : α} :
                                                                                                                                                                      (a +ᵥ f).NeBotf.NeBot
                                                                                                                                                                      theorem Filter.smul_filter.instNeBot {α : Type u_2} {β : Type u_3} [SMul α β] {f : Filter β} {a : α} [f.NeBot] :
                                                                                                                                                                      (a f).NeBot
                                                                                                                                                                      theorem Filter.vadd_filter.instNeBot {α : Type u_2} {β : Type u_3} [VAdd α β] {f : Filter β} {a : α} [f.NeBot] :
                                                                                                                                                                      (a +ᵥ f).NeBot
                                                                                                                                                                      theorem Filter.smul_filter_le_smul_filter {α : Type u_2} {β : Type u_3} [SMul α β] {f₁ f₂ : Filter β} {a : α} (hf : f₁ f₂) :
                                                                                                                                                                      a f₁ a f₂
                                                                                                                                                                      theorem Filter.vadd_filter_le_vadd_filter {α : Type u_2} {β : Type u_3} [VAdd α β] {f₁ f₂ : Filter β} {a : α} (hf : f₁ f₂) :
                                                                                                                                                                      a +ᵥ f₁ a +ᵥ f₂
                                                                                                                                                                      instance Filter.covariant_smul_filter {α : Type u_2} {β : Type u_3} [SMul α β] :
                                                                                                                                                                      CovariantClass α (Filter β) (fun (x1 : α) (x2 : Filter β) => x1 x2) fun (x1 x2 : Filter β) => x1 x2
                                                                                                                                                                      instance Filter.covariant_vadd_filter {α : Type u_2} {β : Type u_3} [VAdd α β] :
                                                                                                                                                                      CovariantClass α (Filter β) (fun (x1 : α) (x2 : Filter β) => x1 +ᵥ x2) fun (x1 x2 : Filter β) => x1 x2
                                                                                                                                                                      instance Filter.smulCommClass_filter {α : Type u_2} {β : Type u_3} {γ : Type u_4} [SMul α γ] [SMul β γ] [SMulCommClass α β γ] :
                                                                                                                                                                      instance Filter.vaddCommClass_filter {α : Type u_2} {β : Type u_3} {γ : Type u_4} [VAdd α γ] [VAdd β γ] [VAddCommClass α β γ] :
                                                                                                                                                                      instance Filter.smulCommClass_filter' {α : Type u_2} {β : Type u_3} {γ : Type u_4} [SMul α γ] [SMul β γ] [SMulCommClass α β γ] :
                                                                                                                                                                      instance Filter.vaddCommClass_filter' {α : Type u_2} {β : Type u_3} {γ : Type u_4} [VAdd α γ] [VAdd β γ] [VAddCommClass α β γ] :
                                                                                                                                                                      instance Filter.smulCommClass_filter'' {α : Type u_2} {β : Type u_3} {γ : Type u_4} [SMul α γ] [SMul β γ] [SMulCommClass α β γ] :
                                                                                                                                                                      instance Filter.vaddCommClass_filter'' {α : Type u_2} {β : Type u_3} {γ : Type u_4} [VAdd α γ] [VAdd β γ] [VAddCommClass α β γ] :
                                                                                                                                                                      instance Filter.smulCommClass {α : Type u_2} {β : Type u_3} {γ : Type u_4} [SMul α γ] [SMul β γ] [SMulCommClass α β γ] :
                                                                                                                                                                      instance Filter.vaddCommClass {α : Type u_2} {β : Type u_3} {γ : Type u_4} [VAdd α γ] [VAdd β γ] [VAddCommClass α β γ] :
                                                                                                                                                                      instance Filter.isScalarTower {α : Type u_2} {β : Type u_3} {γ : Type u_4} [SMul α β] [SMul α γ] [SMul β γ] [IsScalarTower α β γ] :
                                                                                                                                                                      instance Filter.vaddAssocClass {α : Type u_2} {β : Type u_3} {γ : Type u_4} [VAdd α β] [VAdd α γ] [VAdd β γ] [VAddAssocClass α β γ] :
                                                                                                                                                                      instance Filter.isScalarTower' {α : Type u_2} {β : Type u_3} {γ : Type u_4} [SMul α β] [SMul α γ] [SMul β γ] [IsScalarTower α β γ] :
                                                                                                                                                                      instance Filter.vaddAssocClass' {α : Type u_2} {β : Type u_3} {γ : Type u_4} [VAdd α β] [VAdd α γ] [VAdd β γ] [VAddAssocClass α β γ] :
                                                                                                                                                                      instance Filter.isScalarTower'' {α : Type u_2} {β : Type u_3} {γ : Type u_4} [SMul α β] [SMul α γ] [SMul β γ] [IsScalarTower α β γ] :
                                                                                                                                                                      instance Filter.vaddAssocClass'' {α : Type u_2} {β : Type u_3} {γ : Type u_4} [VAdd α β] [VAdd α γ] [VAdd β γ] [VAddAssocClass α β γ] :
                                                                                                                                                                      instance Filter.isCentralScalar {α : Type u_2} {β : Type u_3} [SMul α β] [SMul αᵐᵒᵖ β] [IsCentralScalar α β] :
                                                                                                                                                                      instance Filter.isCentralVAdd {α : Type u_2} {β : Type u_3} [VAdd α β] [VAdd αᵃᵒᵖ β] [IsCentralVAdd α β] :
                                                                                                                                                                      def Filter.mulAction {α : Type u_2} {β : Type u_3} [Monoid α] [MulAction α β] :

                                                                                                                                                                      A multiplicative action of a monoid α on a type β gives a multiplicative action of Filter α on Filter β.

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                                                                                                                                                                          def Filter.addAction {α : Type u_2} {β : Type u_3} [AddMonoid α] [AddAction α β] :

                                                                                                                                                                          An additive action of an additive monoid α on a type β gives an additive action of Filter α on Filter β

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                                                                                                                                                                              def Filter.mulActionFilter {α : Type u_2} {β : Type u_3} [Monoid α] [MulAction α β] :

                                                                                                                                                                              A multiplicative action of a monoid on a type β gives a multiplicative action on Filter β.

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                                                                                                                                                                                  def Filter.addActionFilter {α : Type u_2} {β : Type u_3} [AddMonoid α] [AddAction α β] :

                                                                                                                                                                                  An additive action of an additive monoid on a type β gives an additive action on Filter β.

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                                                                                                                                                                                      def Filter.distribMulActionFilter {α : Type u_2} {β : Type u_3} [Monoid α] [AddMonoid β] [DistribMulAction α β] :

                                                                                                                                                                                      A distributive multiplicative action of a monoid on an additive monoid β gives a distributive multiplicative action on Filter β.

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                                                                                                                                                                                          noncomputable def Filter.mulDistribMulActionFilter {α : Type u_2} {β : Type u_3} [Monoid α] [Monoid β] [MulDistribMulAction α β] :

                                                                                                                                                                                          A multiplicative action of a monoid on a monoid β gives a multiplicative action on Set β.

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                                                                                                                                                                                              Note that we have neither SMulWithZero α (Filter β) nor SMulWithZero (Filter α) (Filter β) because 0 * ⊥ ≠ 0.

                                                                                                                                                                                              theorem Filter.NeBot.smul_zero_nonneg {α : Type u_2} {β : Type u_3} [Zero α] [Zero β] [SMulWithZero α β] {f : Filter α} (hf : f.NeBot) :
                                                                                                                                                                                              0 f 0
                                                                                                                                                                                              theorem Filter.NeBot.zero_smul_nonneg {α : Type u_2} {β : Type u_3} [Zero α] [Zero β] [SMulWithZero α β] {g : Filter β} (hg : g.NeBot) :
                                                                                                                                                                                              0 0 g
                                                                                                                                                                                              theorem Filter.zero_smul_filter_nonpos {α : Type u_2} {β : Type u_3} [Zero α] [Zero β] [SMulWithZero α β] {g : Filter β} :
                                                                                                                                                                                              0 g 0
                                                                                                                                                                                              theorem Filter.zero_smul_filter {α : Type u_2} {β : Type u_3} [Zero α] [Zero β] [SMulWithZero α β] {g : Filter β} (hg : g.NeBot) :
                                                                                                                                                                                              0 g = 0