proposition: Lemma map_row_ebase m n (A : 'M_(m, n)) : (row_ebase A)^f = row_ebase A^f.
proof: Proof. by rewrite {2}/row_ebase unlock Gaussian_elimination_map. 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)