proposition: Lemma isomorphisms_idm (M : {fpmod R}) : isomorphisms (@idm _ M) idm.
proof: Proof. by apply/andP; split; rewrite mulmor1. 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