proposition: Lemma subv0 U : (U <= 0)%VS = (U == 0%VS).
proof: Proof. by rewrite eqEsubv sub0v andbT. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(fintype bigop finfun tuple) mathcomp(ssralg matrix mxalgebra zmodp)