proposition: Lemma not_asubv0 A : ~~ (A <= 0)%VS.
proof: Proof. by rewrite subv0 -dimv_eq0 -lt0n adim_gt0. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq path) mathcomp(choice fintype div tuple finfun bigop ssralg) mathcomp(finalg zmodp matrix vector poly)