Coherence and invertibility of the comparison #
The comparison of Comparison.lean satisfies the three laws of a lax monoidal structure and intertwines the braidings: each is transported from the corresponding law over the algebra, proved in Residue.lean, through the coordinates, using the generator calculus of Calculus.lean. It is moreover invertible for every pair of modules — the inverse built alongside it undoes it on generators — as is the unit comparison; this is the usual strength of base change along an algebra map, in super form.
Contents #
RS.superVectMu_associativity,RS.superVectMu_left_unitality,RS.superVectMu_right_unitality,RS.superVectMu_braiding: the coherence of the comparison inRS.SuperVect.RS.superVectMu_naturality_left,RS.superVectMu_naturality_right,RS.superVectMuEvenRaw_naturalityand its odd companion: naturality in either variable, before and after the coordinates.RS.superVectMuEvenRaw_baseNuEven,RS.baseNuEven_superVectMuEvenRawand their odd companions: the two composites of the comparison with its inverse.RS.SuperVect.isoOfBijective: a morphism of super vector spaces with bijective components is an isomorphism.RS.superVectEps: the unit of the fibre functor.RS.superVectMuIso,RS.isIso_superVectMu,RS.superVectEpsIso,RS.isIso_superVectEps: both comparisons are invertible.
Associativity of the comparison #
Associativity of the monoidal comparison.
Associativity of the monoidal comparison.
Naturality of the comparison in super vector spaces #
The comparison is natural in the left variable.
The comparison is natural in the right variable.
The comparison is invertible #
A residue class is its own coordinate times the unit.
The unit of the residue module is idempotent.
An even product with a residue class is a multiple of the product with the unit.
An odd product with a residue class is a multiple of the product with the unit.
The comparison undoes the inverse, in even degree.
The comparison undoes the inverse, in odd degree.
The inverse undoes the comparison #
The even-even half of the inverse identity.
The odd-odd half of the inverse identity in even degree.
The even-odd half of the inverse identity in odd degree.
The odd-even half of the inverse identity in odd degree.
The inverse undoes the comparison, in even degree.
The inverse undoes the comparison, in odd degree.
The comparison is an isomorphism #
A morphism of super vector spaces with bijective components is an isomorphism.
Equations
- One or more equations did not get rendered due to their size.
Instances For
The raw comparison is bijective in even degree.
The raw comparison is bijective in odd degree.
The even component of the comparison is bijective.
The odd component of the comparison is bijective.
The monoidal comparison is an isomorphism of super vector spaces: base change at a complex point is strong, not merely lax.
Equations
- RS.superVectMuIso P M N = RS.SuperVect.isoOfBijective (RS.superVectMu P M N) ⋯ ⋯
Instances For
The monoidal comparison is invertible.
The unit comparison of the fibre functor, before the coordinates are installed: a complex number is scaled into the algebra and pushed into the base change.
Equations
Instances For
The unit comparison of the fibre functor: the unit super vector space maps to the base change of the unit module.
Equations
- RS.superVectEps P = { evenMap := ↑(RS.toSuperVectEvenEquiv P S.unitMod) ∘ₗ RS.superVectEpsRaw P, oddMap := 0 }
Instances For
The raw unit comparison, evaluated.
The unit comparison, evaluated.
The unit comparison is an isomorphism #
The unit comparison, read through the left unitor, is the canonical copy of a complex number in the residue module.
The raw unit comparison is bijective.
The odd part of the base change of the unit module vanishes.
The odd part of the fibre of the unit module vanishes.
The even component of the unit comparison is bijective.
The odd component of the unit comparison is bijective: both sides vanish.
The unit comparison is an isomorphism of super vector spaces.
Equations
Instances For
The unit comparison is invertible.
Unitality of the comparison #
Left unitality of the monoidal comparison.
Right unitality of the monoidal comparison.
Naturality of the comparison #
The raw comparison is natural in both variables, in even degree.
The comparison intertwines the braidings #
The monoidal comparison intertwines the braidings: the Koszul sign of the super vector spaces is the sign of the braiding of the super modules.
The monoidal comparison intertwines the braidings: the Koszul sign of the super vector spaces is the sign of the braiding of the super modules.