The additive Auslander equivalence of the literal factor category #
The biproduct of the surviving indecomposable representatives is a finite additive generator of the literal factor category. Applying the generic additive-generator equivalence therefore identifies that factor category with the finitely generated projective modules over its Auslander algebra.
This is the finite algebraic ambient category in which the manuscript's smaller, boundary-projective restricted Yoneda realization will be analyzed.
noncomputable def
MagnitudeConjecture.RightModule.FiniteIndecomposableSkeleton.factorAuslanderEquivalence
{k A : Type u}
[Field k]
[Ring A]
[Algebra k A]
[FiniteDimensional k A]
[IsNoetherianRing Aᵐᵒᵖ]
(S : FiniteIndecomposableSkeleton k A)
(K : Set (Fin S.n))
:
S.FactorCategory K ≌ (CategoryTheory.finiteProjectiveModules (CategoryTheory.End (S.factorAdditiveGenerator K))ᵐᵒᵖ).FullSubcategory
The literal factor category is the category of finitely generated projective modules over the opposite endomorphism ring of its surviving additive generator.