Module

RepresentsRelSubPic_nonempty_pullbackAlong_one_iso.lean

Nyll.JacobianVarieties.Picard.RepresentsRelSubPic_nonempty_pullbackAlong_one_iso
1 declaration indexed from sourceView source ↗

Pulling the Poincare bundle back along the identity section gives the unit line bundle.

Declarations

AlgebraicGeometry.RelPicard.RepresentsRelSubPic.nonempty_pullbackAlong_one_iso
Source context 10 commands

Surrounding namespaces, section variables, and local commands at this declaration.

section ProofImplementation
namespace JacobianVarieties.Picard.Proofs.PoincareIdentity
universe u
open _root_.CategoryTheory
open _root_.CategoryTheory.Limits
open _root_.CategoryTheory.MonoidalCategory
open _root_.AlgebraicGeometry
open _root_.NeronModelInfra
open _root_.GoodReductionJacobian
open _root_.AlgebraicGeometry.RelPicard
theorem _root_.AlgebraicGeometry.RelPicard.RepresentsRelSubPic.nonempty_pullbackAlong_one_iso
    {R : Type u} [CommRing R] {C : Scheme.{u}} {c : C ⟶ Spec (CommRingCat.of R)}
    {ε : SchemeHomOver (𝟙 (Spec (CommRingCat.of R))) c}
    {P : SubPicGroupCondition c ε} {D : RelativePic0Designation R c}
    (h : RepresentsRelSubPic c ε P.toSubPicCondition D)
    {T : Scheme.{u}} (t : T ⟶ Spec (CommRingCat.of R)) :
    Nonempty ((h.poincare.pullbackAlong (h.relativeGroupLaw.one t)).L ≅
      (RigidifiedLineBundle.unit (c := c) (ε := ε) t).L)