proposition: Lemma map2_mxvec : map2_mx (mxvec A) (mxvec B) = mxvec (map2_mx A B).
proof: Proof. by apply/rowP=> i; rewrite !(castmxE, mxE). 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)