proposition: Lemma mulid0 m n (I : 'cV[R]_m) : I *i (0 : 'cV[R]_n) = 0.
proof: Proof. by rewrite /mulid trmx0 mulmx0 mxvec0 trmx0. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat div seq path) mathcomp(ssralg fintype perm choice fingroup) mathcomp(matrix bigop zmodp mxalgebra poly) ssrcomplements