Documentation

Iwasawalib.Topology.Algebra.OpenSubgroup

Supplementary results for open normal subgroups #

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@[simp]
theorem OpenNormalSubgroup.mem_top {G : Type u_1} [Group G] [TopologicalSpace G] (x : G) :
@[simp]
theorem OpenNormalAddSubgroup.mem_top {G : Type u_1} [AddGroup G] [TopologicalSpace G] (x : G) :

The product of two open normal subgroups as an open normal subgroup of the product group.

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    The product of two open normal subgroups as an open normal subgroup of the product group.

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      @[simp]
      theorem OpenNormalSubgroup.coe_prod {G : Type u_1} [Group G] [TopologicalSpace G] {H : Type u_2} [Group H] [TopologicalSpace H] (U : OpenNormalSubgroup G) (V : OpenNormalSubgroup H) :
      (U.prod V) = U ×ˢ V
      @[simp]
      def OpenNormalSubgroup.comap {G : Type u_1} [Group G] [TopologicalSpace G] {N : Type u_2} [Group N] [TopologicalSpace N] (f : G →* N) (hf : Continuous f) (H : OpenNormalSubgroup N) :

      The preimage of an OpenNormalSubgroup along a continuous Monoid homomorphism is an OpenNormalSubgroup.

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        The preimage of an OpenNormalAddSubgroup along a continuous AddMonoid homomorphism is an OpenNormalAddSubgroup.

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          @[simp]
          theorem OpenNormalSubgroup.coe_comap {G : Type u_1} [Group G] [TopologicalSpace G] {N : Type u_2} [Group N] [TopologicalSpace N] (H : OpenNormalSubgroup N) (f : G →* N) (hf : Continuous f) :
          (comap f hf H) = f ⁻¹' H
          @[simp]
          theorem OpenNormalAddSubgroup.coe_comap {G : Type u_1} [AddGroup G] [TopologicalSpace G] {N : Type u_2} [AddGroup N] [TopologicalSpace N] (H : OpenNormalAddSubgroup N) (f : G →+ N) (hf : Continuous f) :
          (comap f hf H) = f ⁻¹' H
          @[simp]
          theorem OpenNormalSubgroup.mem_comap {G : Type u_1} [Group G] [TopologicalSpace G] {N : Type u_2} [Group N] [TopologicalSpace N] {H : OpenNormalSubgroup N} {f : G →* N} {hf : Continuous f} {x : G} :
          x comap f hf H f x H
          @[simp]
          theorem OpenNormalAddSubgroup.mem_comap {G : Type u_1} [AddGroup G] [TopologicalSpace G] {N : Type u_2} [AddGroup N] [TopologicalSpace N] {H : OpenNormalAddSubgroup N} {f : G →+ N} {hf : Continuous f} {x : G} :
          x comap f hf H f x H
          theorem OpenNormalSubgroup.comap_comap {G : Type u_1} [Group G] [TopologicalSpace G] {N : Type u_2} [Group N] [TopologicalSpace N] {P : Type u_3} [Group P] [TopologicalSpace P] (K : OpenNormalSubgroup P) (f₂ : N →* P) (hf₂ : Continuous f₂) (f₁ : G →* N) (hf₁ : Continuous f₁) :
          comap f₁ hf₁ (comap f₂ hf₂ K) = comap (f₂.comp f₁) K
          theorem OpenNormalAddSubgroup.comap_comap {G : Type u_1} [AddGroup G] [TopologicalSpace G] {N : Type u_2} [AddGroup N] [TopologicalSpace N] {P : Type u_3} [AddGroup P] [TopologicalSpace P] (K : OpenNormalAddSubgroup P) (f₂ : N →+ P) (hf₂ : Continuous f₂) (f₁ : G →+ N) (hf₁ : Continuous f₁) :
          comap f₁ hf₁ (comap f₂ hf₂ K) = comap (f₂.comp f₁) K