The Deligne bridge #
Connecting the fibre-functor interface to the extraction: a
braided monoidal functor into SuperVect carries a self-dual
object with a supersymmetric form to a standard orthosymplectic
model. The pairing transports by ExactPairing.map, the
supersymmetry by the braided-functor axiom, and
exists_std_model produces the coordinates.
theorem
RS.braided_transported_supersymmetry
{A : Type u_1}
[CategoryTheory.Category.{u_2, u_1} A]
[CategoryTheory.MonoidalCategory A]
[CategoryTheory.SymmetricCategory A]
(ω : CategoryTheory.Functor A SuperVect)
[ω.Braided]
(X : A)
[CategoryTheory.ExactPairing X X]
(hsym : CategoryTheory.CategoryStruct.comp (β_ X X).hom (ε_ X X) = ε_ X X)
:
SuperVect.Hom.comp
(CategoryTheory.CategoryStruct.comp (CategoryTheory.Functor.LaxMonoidal.μ ω X X)
(CategoryTheory.CategoryStruct.comp (ω.map (ε_ X X)) (CategoryTheory.Functor.OplaxMonoidal.η ω)))
((ω.obj X).koszulBraiding (ω.obj X)) = CategoryTheory.CategoryStruct.comp (CategoryTheory.Functor.LaxMonoidal.μ ω X X)
(CategoryTheory.CategoryStruct.comp (ω.map (ε_ X X)) (CategoryTheory.Functor.OplaxMonoidal.η ω))
Supersymmetry transports along a braided functor into SuperVect: the transported form absorbs the Koszul braiding.
theorem
RS.braided_std_model
{A : Type u_1}
[CategoryTheory.Category.{u_2, u_1} A]
[CategoryTheory.MonoidalCategory A]
[CategoryTheory.SymmetricCategory A]
(ω : CategoryTheory.Functor A SuperVect)
[ω.Braided]
(X : A)
[CategoryTheory.ExactPairing X X]
(hsym : CategoryTheory.CategoryStruct.comp (β_ X X).hom (ε_ X X) = ε_ X X)
:
∃ (k : ℕ) (ℓ : ℕ) (e : (stdSuperPair k ℓ).Hom (ω.obj X)) (e' : (ω.obj X).Hom (stdSuperPair k ℓ)),
e'.comp e = SuperVect.Hom.id (stdSuperPair k ℓ) ∧ e.comp e' = SuperVect.Hom.id (ω.obj X) ∧ SuperVect.Hom.comp
(CategoryTheory.CategoryStruct.comp (CategoryTheory.Functor.LaxMonoidal.μ ω X X)
(CategoryTheory.CategoryStruct.comp (ω.map (ε_ X X)) (CategoryTheory.Functor.OplaxMonoidal.η ω)))
(SuperVect.tensorHom e e) = stdForm k ℓ ∧ (SuperVect.tensorHom e' e').comp
(CategoryTheory.CategoryStruct.comp (CategoryTheory.Functor.LaxMonoidal.ε ω)
(CategoryTheory.CategoryStruct.comp (ω.map (η_ X X)) (CategoryTheory.Functor.OplaxMonoidal.δ ω X X))) = stdCopair k ℓ
The Deligne bridge: a braided monoidal functor into SuperVect carries a self-dual object with a supersymmetric form to a standard orthosymplectic model — the transported form becomes the standard form and the transported copairing the standard copairing.