fact: Definition iso_of_kc phi (k : kernel phi %= 0) (c : coker phi %= 0) : isomorphism_of := @Isomorphism phi (split_andb k c).
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat div seq path) mathcomp(ssralg fintype perm choice matrix bigop zmodp mxalgebra poly) ssrcomplements stronglydiscrete coherent edr