proposition: Lemma mul_vec_lin_row A u : mxvec A *m lin_mul_row u = u *m A.
proof: Proof. by rewrite mul_rV_lin1 /= mxvecK. Qed.
imports: HB(structures) mathcomp(ssreflect ssrbool ssrfun eqtype ssrnat seq choice) mathcomp(fintype finfun bigop finset fingroup perm order) mathcomp(div prime binomial ssralg countalg finalg zmodp)