proposition: Lemma trmxV (A : 'M_n) : A^-1^T = (A^T)^-1.
proof: Proof. exact: trmx_inv. 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)