The graded irreducible quotient dimension in every degree #
theorem
MagnitudeConjecture.RightModule.FiniteIndecomposableSkeleton.standardFormGraded_radical_bot_of_le
{k A : Type u}
[Field k]
[IsAlgClosed k]
[Ring A]
[Algebra k A]
[FiniteDimensional k A]
[IsNoetherianRing Aᵐᵒᵖ]
(S : FiniteIndecomposableSkeleton k A)
(X Y : S.StandardFormMeshCategory)
(s t : ℤ)
(hst : s ≤ t)
:
CategoricalIrreducible.radical k { obj := S.standardFormGradedVertexFunctor.obj X, degree := s }
{ obj := S.standardFormGradedVertexFunctor.obj Y, degree := t } = ⊥
Nonpositive degree has no nonzero radical morphisms between the representatives.
def
MagnitudeConjecture.RightModule.FiniteIndecomposableSkeleton.standardFormGraded_irreducible_finrank
{k A : Type u}
[Field k]
[IsAlgClosed k]
[Ring A]
[Algebra k A]
[FiniteDimensional k A]
[IsNoetherianRing Aᵐᵒᵖ]
(S : FiniteIndecomposableSkeleton k A)
(X Y : S.StandardFormMeshCategory)
(s t : ℤ)
:
Module.finrank k
(CategoricalIrreducible.Space k { obj := S.standardFormGradedVertexFunctor.obj X, degree := s }
{ obj := S.standardFormGradedVertexFunctor.obj Y, degree := t }) = if s = t + 1 then Module.finrank k ↥(S.standardFormIntegerHomGrading.component X Y 1) else 0
Only degree one contributes to the intrinsic irreducible quotient dimension.