Documentation

Mathlib.Geometry.Manifold.Sheaf.Smooth

The sheaf of smooth functions on a manifold #

The sheaf of 𝕜-smooth functions from a manifold M to a manifold N can be defined as a sheaf of types using the construction StructureGroupoid.LocalInvariantProp.sheaf from the file Mathlib.Geometry.Manifold.Sheaf.Basic. In this file we write that down (a one-liner), then do the work of upgrading this to a sheaf of [groups]/[abelian groups]/[rings]/[commutative rings] when N carries more algebraic structure. For example, if N is 𝕜 then the sheaf of smooth functions from M to 𝕜 is a sheaf of commutative rings, the structure sheaf of M.

Main definitions #

Main results #

TODO #

There are variants of smoothSheafCommGroup.compLeft for Grp, RingCat, CommRingCat; this is just boilerplate and can be added as needed.

Similarly, there are variants of smoothSheafCommRing.forgetStalk and smoothSheafCommRing.eval for Grp, CommGrp and RingCat which can be added as needed.

Currently there is a universe restriction: one can consider the sheaf of smooth functions from M to N only if M and N are in the same universe. For example, since is in Type, we can only consider the structure sheaf of complex manifolds in Type, which is unsatisfactory. The obstacle here is in the underlying category theory constructions, which are not sufficiently universe polymorphic. A direct attempt to generalize the universes worked in Lean 3 but was reverted because it was hard to port to Lean 4, see https://github.com/leanprover-community/mathlib/pull/19230 The current (Oct 2023) proposal to permit these generalizations is to use the new UnivLE typeclass, and some (but not all) of the underlying category theory constructions have now been generalized by this method: see https://github.com/leanprover-community/mathlib4/pull/5724, https://github.com/leanprover-community/mathlib4/pull/5726.

def smoothSheaf {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] (IM : ModelWithCorners 𝕜 EM HM) {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] (I : ModelWithCorners 𝕜 E H) (M : Type u) [TopologicalSpace M] [ChartedSpace HM M] (N : Type u) [TopologicalSpace N] [ChartedSpace H N] :

The sheaf of smooth functions from M to N, as a sheaf of types.

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    instance smoothSheaf.coeFun {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] (IM : ModelWithCorners 𝕜 EM HM) {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] (I : ModelWithCorners 𝕜 E H) {M : Type u} [TopologicalSpace M] [ChartedSpace HM M] (N : Type u) [TopologicalSpace N] [ChartedSpace H N] (U : (TopologicalSpace.Opens (TopCat.of M))ᵒᵖ) :
    CoeFun ((smoothSheaf IM I M N).presheaf.obj U) fun (x : (smoothSheaf IM I M N).presheaf.obj U) => (Opposite.unop U)N
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    theorem smoothSheaf.obj_eq {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] (IM : ModelWithCorners 𝕜 EM HM) {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] (I : ModelWithCorners 𝕜 E H) {M : Type u} [TopologicalSpace M] [ChartedSpace HM M] (N : Type u) [TopologicalSpace N] [ChartedSpace H N] (U : (TopologicalSpace.Opens (TopCat.of M))ᵒᵖ) :
    (smoothSheaf IM I M N).presheaf.obj U = ContMDiffMap IM I (↥(Opposite.unop U)) N

    The object of smoothSheaf IM I M N for the open set U in M is C^∞⟮IM, (unop U : Opens M); I, N⟯, the (IM, I)-smooth functions from U to N. This is not just a "moral" equality but a literal and definitional equality!

    def smoothSheaf.eval {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] (IM : ModelWithCorners 𝕜 EM HM) {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] (I : ModelWithCorners 𝕜 E H) {M : Type u} [TopologicalSpace M] [ChartedSpace HM M] (N : Type u) [TopologicalSpace N] [ChartedSpace H N] (x : M) :
    (smoothSheaf IM I M N).presheaf.stalk xN

    Canonical map from the stalk of smoothSheaf IM I M N at x to N, given by evaluating sections at x.

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      def smoothSheaf.evalHom {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] (IM : ModelWithCorners 𝕜 EM HM) {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] (I : ModelWithCorners 𝕜 E H) {M : Type u} [TopologicalSpace M] [ChartedSpace HM M] (N : Type u) [TopologicalSpace N] [ChartedSpace H N] (x : (TopCat.of M)) :
      (smoothSheaf IM I M N).presheaf.stalk x N

      Canonical map from the stalk of smoothSheaf IM I M N at x to N, given by evaluating sections at x, considered as a morphism in the category of types.

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        def smoothSheaf.evalAt {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] (IM : ModelWithCorners 𝕜 EM HM) {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] (I : ModelWithCorners 𝕜 E H) {M : Type u} [TopologicalSpace M] [ChartedSpace HM M] (N : Type u) [TopologicalSpace N] [ChartedSpace H N] (x : (TopCat.of M)) (U : TopologicalSpace.OpenNhds x) (i : (smoothSheaf IM I M N).presheaf.obj (Opposite.op U.obj)) :
        N

        Given manifolds M, N and an open neighbourhood U of a point x : M, the evaluation-at-x map to N from smooth functions from U to N.

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          theorem smoothSheaf.ι_evalHom_apply {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] (IM : ModelWithCorners 𝕜 EM HM) {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] (I : ModelWithCorners 𝕜 E H) {M : Type u} [TopologicalSpace M] [ChartedSpace HM M] (N : Type u) [TopologicalSpace N] [ChartedSpace H N] (x : (TopCat.of M)) (U : (TopologicalSpace.OpenNhds x)ᵒᵖ) (x✝ : ((TopologicalSpace.OpenNhds.inclusion x).op.comp (smoothSheaf IM I M N).val).obj U) :
          theorem smoothSheaf.eval_surjective {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] (IM : ModelWithCorners 𝕜 EM HM) {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] (I : ModelWithCorners 𝕜 E H) {M : Type u} [TopologicalSpace M] [ChartedSpace HM M] (N : Type u) [TopologicalSpace N] [ChartedSpace H N] (x : M) :

          The eval map is surjective at x.

          instance instNontrivialStalkPresheafSmoothSheaf {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] (IM : ModelWithCorners 𝕜 EM HM) {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] (I : ModelWithCorners 𝕜 E H) {M : Type u} [TopologicalSpace M] [ChartedSpace HM M] (N : Type u) [TopologicalSpace N] [ChartedSpace H N] [Nontrivial N] (x : M) :
          Nontrivial ((smoothSheaf IM I M N).presheaf.stalk x)
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          @[simp]
          theorem smoothSheaf.eval_germ {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] {IM : ModelWithCorners 𝕜 EM HM} {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] {I : ModelWithCorners 𝕜 E H} {M : Type u} [TopologicalSpace M] [ChartedSpace HM M] {N : Type u} [TopologicalSpace N] [ChartedSpace H N] (U : TopologicalSpace.Opens M) (x : M) (hx : x U) (f : (smoothSheaf IM I M N).presheaf.obj (Opposite.op U)) :
          smoothSheaf.eval IM I N x ((smoothSheaf IM I M N).presheaf.germ U x hx f) = f x, hx
          theorem smoothSheaf.smooth_section {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] {IM : ModelWithCorners 𝕜 EM HM} {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] {I : ModelWithCorners 𝕜 E H} {M : Type u} [TopologicalSpace M] [ChartedSpace HM M] {N : Type u} [TopologicalSpace N] [ChartedSpace H N] {U : (TopologicalSpace.Opens (TopCat.of M))ᵒᵖ} (f : (smoothSheaf IM I M N).presheaf.obj U) :
          Smooth IM I f
          noncomputable instance instGroupObjOppositeOpensαTopologicalSpaceOfPresheafSmoothSheaf {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] (IM : ModelWithCorners 𝕜 EM HM) {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] (I : ModelWithCorners 𝕜 E H) (M : Type u) [TopologicalSpace M] [ChartedSpace HM M] (G : Type u) [TopologicalSpace G] [ChartedSpace H G] [Group G] [LieGroup I G] (U : (TopologicalSpace.Opens (TopCat.of M))ᵒᵖ) :
          Group ((smoothSheaf IM I M G).presheaf.obj U)
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          noncomputable instance instAddGroupObjOppositeOpensαTopologicalSpaceOfPresheafSmoothSheaf {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] (IM : ModelWithCorners 𝕜 EM HM) {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] (I : ModelWithCorners 𝕜 E H) (M : Type u) [TopologicalSpace M] [ChartedSpace HM M] (G : Type u) [TopologicalSpace G] [ChartedSpace H G] [AddGroup G] [LieAddGroup I G] (U : (TopologicalSpace.Opens (TopCat.of M))ᵒᵖ) :
          AddGroup ((smoothSheaf IM I M G).presheaf.obj U)
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          noncomputable def smoothPresheafGroup {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] (IM : ModelWithCorners 𝕜 EM HM) {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] (I : ModelWithCorners 𝕜 E H) (M : Type u) [TopologicalSpace M] [ChartedSpace HM M] (G : Type u) [TopologicalSpace G] [ChartedSpace H G] [Group G] [LieGroup I G] :

          The presheaf of smooth functions from M to G, for G a Lie group, as a presheaf of groups.

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          • One or more equations did not get rendered due to their size.
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            noncomputable def smoothPresheafAddGroup {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] (IM : ModelWithCorners 𝕜 EM HM) {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] (I : ModelWithCorners 𝕜 E H) (M : Type u) [TopologicalSpace M] [ChartedSpace HM M] (G : Type u) [TopologicalSpace G] [ChartedSpace H G] [AddGroup G] [LieAddGroup I G] :

            The presheaf of smooth functions from M to G, for G an additive Lie group, as a presheaf of additive groups.

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            • One or more equations did not get rendered due to their size.
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              noncomputable def smoothSheafGroup {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] (IM : ModelWithCorners 𝕜 EM HM) {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] (I : ModelWithCorners 𝕜 E H) (M : Type u) [TopologicalSpace M] [ChartedSpace HM M] (G : Type u) [TopologicalSpace G] [ChartedSpace H G] [Group G] [LieGroup I G] :

              The sheaf of smooth functions from M to G, for G a Lie group, as a sheaf of groups.

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                noncomputable def smoothSheafAddGroup {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] (IM : ModelWithCorners 𝕜 EM HM) {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] (I : ModelWithCorners 𝕜 E H) (M : Type u) [TopologicalSpace M] [ChartedSpace HM M] (G : Type u) [TopologicalSpace G] [ChartedSpace H G] [AddGroup G] [LieAddGroup I G] :

                The sheaf of smooth functions from M to G, for G an additive Lie group, as a sheaf of additive groups.

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                  noncomputable instance instCommGroupObjOppositeOpensαTopologicalSpaceOfPresheafSmoothSheaf {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] (IM : ModelWithCorners 𝕜 EM HM) {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] (I : ModelWithCorners 𝕜 E H) (M : Type u) [TopologicalSpace M] [ChartedSpace HM M] (A : Type u) [TopologicalSpace A] [ChartedSpace H A] [CommGroup A] [LieGroup I A] (U : (TopologicalSpace.Opens (TopCat.of M))ᵒᵖ) :
                  CommGroup ((smoothSheaf IM I M A).presheaf.obj U)
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                  noncomputable instance instAddCommGroupObjOppositeOpensαTopologicalSpaceOfPresheafSmoothSheaf {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] (IM : ModelWithCorners 𝕜 EM HM) {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] (I : ModelWithCorners 𝕜 E H) (M : Type u) [TopologicalSpace M] [ChartedSpace HM M] (A : Type u) [TopologicalSpace A] [ChartedSpace H A] [AddCommGroup A] [LieAddGroup I A] (U : (TopologicalSpace.Opens (TopCat.of M))ᵒᵖ) :
                  AddCommGroup ((smoothSheaf IM I M A).presheaf.obj U)
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                  noncomputable def smoothPresheafCommGroup {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] (IM : ModelWithCorners 𝕜 EM HM) {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] (I : ModelWithCorners 𝕜 E H) (M : Type u) [TopologicalSpace M] [ChartedSpace HM M] (A : Type u) [TopologicalSpace A] [ChartedSpace H A] [CommGroup A] [LieGroup I A] :

                  The presheaf of smooth functions from M to A, for A an abelian Lie group, as a presheaf of abelian groups.

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                  • One or more equations did not get rendered due to their size.
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                    noncomputable def smoothPresheafAddCommGroup {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] (IM : ModelWithCorners 𝕜 EM HM) {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] (I : ModelWithCorners 𝕜 E H) (M : Type u) [TopologicalSpace M] [ChartedSpace HM M] (A : Type u) [TopologicalSpace A] [ChartedSpace H A] [AddCommGroup A] [LieAddGroup I A] :

                    The presheaf of smooth functions from M to A, for A an additive abelian Lie group, as a presheaf of additive abelian groups.

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                    • One or more equations did not get rendered due to their size.
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                      noncomputable def smoothSheafCommGroup {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] (IM : ModelWithCorners 𝕜 EM HM) {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] (I : ModelWithCorners 𝕜 E H) (M : Type u) [TopologicalSpace M] [ChartedSpace HM M] (A : Type u) [TopologicalSpace A] [ChartedSpace H A] [CommGroup A] [LieGroup I A] :

                      The sheaf of smooth functions from M to A, for A an abelian Lie group, as a sheaf of abelian groups.

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                        noncomputable def smoothSheafAddCommGroup {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] (IM : ModelWithCorners 𝕜 EM HM) {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] (I : ModelWithCorners 𝕜 E H) (M : Type u) [TopologicalSpace M] [ChartedSpace HM M] (A : Type u) [TopologicalSpace A] [ChartedSpace H A] [AddCommGroup A] [LieAddGroup I A] :

                        The sheaf of smooth functions from M to A, for A an abelian additive Lie group, as a sheaf of abelian additive groups.

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                          def smoothSheafCommGroup.compLeft {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] (IM : ModelWithCorners 𝕜 EM HM) {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] (I : ModelWithCorners 𝕜 E H) {H' : Type u_6} [TopologicalSpace H'] (I' : ModelWithCorners 𝕜 E H') (M : Type u) [TopologicalSpace M] [ChartedSpace HM M] (A A' : Type u) [TopologicalSpace A] [ChartedSpace H A] [TopologicalSpace A'] [ChartedSpace H' A'] [CommGroup A] [CommGroup A'] [LieGroup I A] [LieGroup I' A'] (φ : A →* A') (hφ : Smooth I I' φ) :

                          For a manifold M and a smooth homomorphism φ between abelian Lie groups A, A', the 'left-composition-by-φ' morphism of sheaves from smoothSheafCommGroup IM I M A to smoothSheafCommGroup IM I' M A'.

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                            def smoothSheafAddCommGroup.compLeft {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] (IM : ModelWithCorners 𝕜 EM HM) {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] (I : ModelWithCorners 𝕜 E H) {H' : Type u_6} [TopologicalSpace H'] (I' : ModelWithCorners 𝕜 E H') (M : Type u) [TopologicalSpace M] [ChartedSpace HM M] (A A' : Type u) [TopologicalSpace A] [ChartedSpace H A] [TopologicalSpace A'] [ChartedSpace H' A'] [AddCommGroup A] [AddCommGroup A'] [LieAddGroup I A] [LieAddGroup I' A'] (φ : A →+ A') (hφ : Smooth I I' φ) :

                            For a manifold M and a smooth homomorphism φ between abelian additive Lie groups A, A', the 'left-composition-by-φ' morphism of sheaves from smoothSheafAddCommGroup IM I M A to smoothSheafAddCommGroup IM I' M A'.

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                              instance instRingObjOppositeOpensαTopologicalSpaceOfPresheafSmoothSheaf {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] (IM : ModelWithCorners 𝕜 EM HM) {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] (I : ModelWithCorners 𝕜 E H) (M : Type u) [TopologicalSpace M] [ChartedSpace HM M] (R : Type u) [TopologicalSpace R] [ChartedSpace H R] [Ring R] [SmoothRing I R] (U : (TopologicalSpace.Opens (TopCat.of M))ᵒᵖ) :
                              Ring ((smoothSheaf IM I M R).presheaf.obj U)
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                              def smoothPresheafRing {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] (IM : ModelWithCorners 𝕜 EM HM) {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] (I : ModelWithCorners 𝕜 E H) (M : Type u) [TopologicalSpace M] [ChartedSpace HM M] (R : Type u) [TopologicalSpace R] [ChartedSpace H R] [Ring R] [SmoothRing I R] :

                              The presheaf of smooth functions from M to R, for R a smooth ring, as a presheaf of rings.

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                              • One or more equations did not get rendered due to their size.
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                                def smoothSheafRing {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] (IM : ModelWithCorners 𝕜 EM HM) {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] (I : ModelWithCorners 𝕜 E H) (M : Type u) [TopologicalSpace M] [ChartedSpace HM M] (R : Type u) [TopologicalSpace R] [ChartedSpace H R] [Ring R] [SmoothRing I R] :

                                The sheaf of smooth functions from M to R, for R a smooth ring, as a sheaf of rings.

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                                  instance instCommRingObjOppositeOpensαTopologicalSpaceOfPresheafSmoothSheaf {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] (IM : ModelWithCorners 𝕜 EM HM) {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] (I : ModelWithCorners 𝕜 E H) (M : Type u) [TopologicalSpace M] [ChartedSpace HM M] (R : Type u) [TopologicalSpace R] [ChartedSpace H R] [CommRing R] [SmoothRing I R] (U : (TopologicalSpace.Opens (TopCat.of M))ᵒᵖ) :
                                  CommRing ((smoothSheaf IM I M R).presheaf.obj U)
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                                  def smoothPresheafCommRing {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] (IM : ModelWithCorners 𝕜 EM HM) {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] (I : ModelWithCorners 𝕜 E H) (M : Type u) [TopologicalSpace M] [ChartedSpace HM M] (R : Type u) [TopologicalSpace R] [ChartedSpace H R] [CommRing R] [SmoothRing I R] :

                                  The presheaf of smooth functions from M to R, for R a smooth commutative ring, as a presheaf of commutative rings.

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                                    def smoothSheafCommRing {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] (IM : ModelWithCorners 𝕜 EM HM) {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] (I : ModelWithCorners 𝕜 E H) (M : Type u) [TopologicalSpace M] [ChartedSpace HM M] (R : Type u) [TopologicalSpace R] [ChartedSpace H R] [CommRing R] [SmoothRing I R] :

                                    The sheaf of smooth functions from M to R, for R a smooth commutative ring, as a sheaf of commutative rings.

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                                      instance smoothSheafCommRing.coeFun {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] (IM : ModelWithCorners 𝕜 EM HM) {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] (I : ModelWithCorners 𝕜 E H) (M : Type u) [TopologicalSpace M] [ChartedSpace HM M] (R : Type u) [TopologicalSpace R] [ChartedSpace H R] [CommRing R] [SmoothRing I R] (U : (TopologicalSpace.Opens (TopCat.of M))ᵒᵖ) :
                                      CoeFun ((smoothSheafCommRing IM I M R).presheaf.obj U) fun (x : ((smoothSheafCommRing IM I M R).presheaf.obj U)) => (Opposite.unop U)R
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                                      def smoothSheafCommRing.forgetStalk {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] (IM : ModelWithCorners 𝕜 EM HM) {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] (I : ModelWithCorners 𝕜 E H) (M : Type u) [TopologicalSpace M] [ChartedSpace HM M] (R : Type u) [TopologicalSpace R] [ChartedSpace H R] [CommRing R] [SmoothRing I R] (x : (TopCat.of M)) :
                                      (CategoryTheory.forget CommRingCat).obj ((smoothSheafCommRing IM I M R).presheaf.stalk x) (smoothSheaf IM I M R).presheaf.stalk x

                                      Identify the stalk at a point of the sheaf-of-commutative-rings of functions from M to R (for R a smooth ring) with the stalk at that point of the corresponding sheaf of types.

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                                        theorem smoothSheafCommRing.ι_forgetStalk_inv_apply {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] (IM : ModelWithCorners 𝕜 EM HM) {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] (I : ModelWithCorners 𝕜 E H) (M : Type u) [TopologicalSpace M] [ChartedSpace HM M] (R : Type u) [TopologicalSpace R] [ChartedSpace H R] [CommRing R] [SmoothRing I R] (x : (TopCat.of M)) (U : (TopologicalSpace.OpenNhds x)ᵒᵖ) (x✝ : ((TopologicalSpace.OpenNhds.inclusion x).op.comp (smoothSheaf IM I M R).presheaf).obj U) :
                                        def smoothSheafCommRing.evalAt {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] (IM : ModelWithCorners 𝕜 EM HM) {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] (I : ModelWithCorners 𝕜 E H) (M : Type u) [TopologicalSpace M] [ChartedSpace HM M] (R : Type u) [TopologicalSpace R] [ChartedSpace H R] [CommRing R] [SmoothRing I R] (x : (TopCat.of M)) (U : TopologicalSpace.OpenNhds x) :
                                        (smoothSheafCommRing IM I M R).presheaf.obj (Opposite.op U.obj) CommRingCat.of R

                                        Given a smooth commutative ring R and a manifold M, and an open neighbourhood U of a point x : M, the evaluation-at-x map to R from smooth functions from U to R.

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                                          def smoothSheafCommRing.evalHom {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] (IM : ModelWithCorners 𝕜 EM HM) {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] (I : ModelWithCorners 𝕜 E H) (M : Type u) [TopologicalSpace M] [ChartedSpace HM M] (R : Type u) [TopologicalSpace R] [ChartedSpace H R] [CommRing R] [SmoothRing I R] (x : (TopCat.of M)) :
                                          (smoothSheafCommRing IM I M R).presheaf.stalk x CommRingCat.of R

                                          Canonical ring homomorphism from the stalk of smoothSheafCommRing IM I M R at x to R, given by evaluating sections at x, considered as a morphism in the category of commutative rings.

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                                            def smoothSheafCommRing.eval {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] (IM : ModelWithCorners 𝕜 EM HM) {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] (I : ModelWithCorners 𝕜 E H) (M : Type u) [TopologicalSpace M] [ChartedSpace HM M] (R : Type u) [TopologicalSpace R] [ChartedSpace H R] [CommRing R] [SmoothRing I R] (x : M) :
                                            ((smoothSheafCommRing IM I M R).presheaf.stalk x) →+* R

                                            Canonical ring homomorphism from the stalk of smoothSheafCommRing IM I M R at x to R, given by evaluating sections at x.

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                                              theorem smoothSheafCommRing.ι_evalHom_apply {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] (IM : ModelWithCorners 𝕜 EM HM) {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] (I : ModelWithCorners 𝕜 E H) (M : Type u) [TopologicalSpace M] [ChartedSpace HM M] (R : Type u) [TopologicalSpace R] [ChartedSpace H R] [CommRing R] [SmoothRing I R] (x : (TopCat.of M)) (U : (TopologicalSpace.OpenNhds x)ᵒᵖ) (x✝ : (CategoryTheory.forget CommRingCat).obj (((TopologicalSpace.OpenNhds.inclusion x).op.comp (smoothSheafCommRing IM I M R).presheaf).obj U)) :
                                              @[simp]
                                              theorem smoothSheafCommRing.evalHom_germ {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] (IM : ModelWithCorners 𝕜 EM HM) {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] (I : ModelWithCorners 𝕜 E H) (M : Type u) [TopologicalSpace M] [ChartedSpace HM M] (R : Type u) [TopologicalSpace R] [ChartedSpace H R] [CommRing R] [SmoothRing I R] (U : TopologicalSpace.Opens (TopCat.of M)) (x : M) (hx : x U) (f : ((smoothSheafCommRing IM I M R).presheaf.obj (Opposite.op U))) :
                                              (smoothSheafCommRing.evalHom IM I M R x) (((smoothSheafCommRing IM I M R).presheaf.germ U x hx) f) = f x, hx
                                              theorem smoothSheafCommRing.forgetStalk_inv_comp_eval_apply {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] (IM : ModelWithCorners 𝕜 EM HM) {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] (I : ModelWithCorners 𝕜 E H) (M : Type u) [TopologicalSpace M] [ChartedSpace HM M] (R : Type u) [TopologicalSpace R] [ChartedSpace H R] [CommRing R] [SmoothRing I R] (x : (TopCat.of M)) (x✝ : (smoothSheaf IM I M R).presheaf.stalk x) :
                                              (smoothSheafCommRing.evalHom IM I M R x) ((smoothSheafCommRing.forgetStalk IM I M R x).inv x✝) = smoothSheaf.evalHom IM I R x x✝
                                              theorem smoothSheafCommRing.forgetStalk_hom_comp_evalHom_apply {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] (IM : ModelWithCorners 𝕜 EM HM) {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] (I : ModelWithCorners 𝕜 E H) (M : Type u) [TopologicalSpace M] [ChartedSpace HM M] (R : Type u) [TopologicalSpace R] [ChartedSpace H R] [CommRing R] [SmoothRing I R] (x : (TopCat.of M)) (x✝ : (CategoryTheory.forget CommRingCat).obj ((smoothSheafCommRing IM I M R).presheaf.stalk x)) :
                                              smoothSheaf.evalHom IM I R x ((smoothSheafCommRing.forgetStalk IM I M R x).hom x✝) = (smoothSheafCommRing.evalHom IM I M R x) x✝
                                              theorem smoothSheafCommRing.eval_surjective {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] (IM : ModelWithCorners 𝕜 EM HM) {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] (I : ModelWithCorners 𝕜 E H) (M : Type u) [TopologicalSpace M] [ChartedSpace HM M] (R : Type u) [TopologicalSpace R] [ChartedSpace H R] [CommRing R] [SmoothRing I R] (x : M) :
                                              instance instNontrivialαCommRingStalkCommRingCatPresheafSmoothSheafCommRing {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] (IM : ModelWithCorners 𝕜 EM HM) {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] (I : ModelWithCorners 𝕜 E H) (M : Type u) [TopologicalSpace M] [ChartedSpace HM M] (R : Type u) [TopologicalSpace R] [ChartedSpace H R] [CommRing R] [SmoothRing I R] [Nontrivial R] (x : M) :
                                              Nontrivial ((smoothSheafCommRing IM I M R).presheaf.stalk x)
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                                              @[simp]
                                              theorem smoothSheafCommRing.eval_germ {𝕜 : Type u_1} [NontriviallyNormedField 𝕜] {EM : Type u_2} [NormedAddCommGroup EM] [NormedSpace 𝕜 EM] {HM : Type u_3} [TopologicalSpace HM] {IM : ModelWithCorners 𝕜 EM HM} {E : Type u_4} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type u_5} [TopologicalSpace H] {I : ModelWithCorners 𝕜 E H} {M : Type u} [TopologicalSpace M] [ChartedSpace HM M] {R : Type u} [TopologicalSpace R] [ChartedSpace H R] [CommRing R] [SmoothRing I R] (U : TopologicalSpace.Opens M) (x : M) (hx : x U) (f : ((smoothSheafCommRing IM I M R).presheaf.obj (Opposite.op U))) :
                                              (smoothSheafCommRing.eval IM I M R x) (((smoothSheafCommRing IM I M R).presheaf.germ U x hx) f) = f x, hx