proposition: Lemma trmx0 m n : (0 : 'M_(m, n))^T = 0.
proof: Proof. exact: trmx_const. 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)