proposition: Lemma mul0id m n (I : 'cV[R]_n) : (0 : 'cV[R]_m) *i I = 0.
proof: Proof. by rewrite /mulid mul0mx 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