proposition: Lemma row_base0 (m n : nat) : row_base (0 : 'M[F]_(m, n)) = 0.
proof: Proof. by apply/eqmx0P; rewrite !eq_row_base !sub0mx. 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)