FoxDifferential.Completed.DifferentialModule.Map
The completed differential module is organized separately from coefficient algebras; its universal and quotient maps are used by completed crossed differentials.
Comap
The index map that sends a target finite quotient to its pullback finite quotient on the source.
GroupLike
Coefficient change is performed stagewise: each coefficient is transported by the given ring homomorphism while the finite quotient support is left unchanged.
Limit
Coefficient change is performed stagewise: each coefficient is transported by the given ring homomorphism while the finite quotient support is left unchanged.
Stage
Coefficient change is performed stagewise: each coefficient is transported by the given ring homomorphism while the finite quotient support is left unchanged.
Surjective
If \(\psi : G \to H\) is surjective, then the induced map of prime-power completed group algebras is surjective.