proposition: Lemma map_ltmx m1 m2 n (A : 'M_(m1, n)) (B : 'M_(m2, n)) : (A^f < B^f)%MS = (A < B)%MS.
proof: Proof. by rewrite /ltmx !map_submx. 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 finalg zmodp matrix)