proposition: Lemma dimv_eq0 U : (\dim U == 0) = (U == 0%VS).
proof: Proof. by rewrite /dimv /= mxrank_eq0 {2}/eq_op /= linear0 genmx0. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(fintype bigop finfun tuple) mathcomp(ssralg matrix mxalgebra zmodp)