proposition: Lemma dimv0 : \dim (0%VS : {vspace vT}) = 0.
proof: Proof. by rewrite /dimv vs2mx0 mxrank0. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(fintype bigop finfun tuple) mathcomp(ssralg matrix mxalgebra zmodp)