proposition: Lemma mul_klift (M N : {fpmod R}) (psi : 'Mor(M,N)) : coker (kernel psi) ** lift (kernel psi) psi %= psi.
proof: Proof. by rewrite mul_lift // mulkmor. Qed.
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