proposition: Lemma mulmorc : phi ** coker %= 0.
proof: Proof. by rewrite /eqmor subr0 /= mulmx1 dvd_col_mxl. 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