proposition: Lemma trmx_eq0 (V : zmodType) (m n : nat) (A : 'M[V]_(m, n)) : (A^T == 0) = (A == 0).
proof: Proof. by rewrite -trmx0 (inj_eq (can_inj (@trmxK _ _ _))). Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat div seq path) mathcomp(ssralg fintype perm choice fingroup) mathcomp(matrix bigop zmodp mxalgebra poly) ssrcomplements