proposition: Fact aspaceOver_suproof E : is_aspace (vspaceOver E).
proof: Proof. rewrite /is_aspace has_algid1; last by rewrite mem_vspaceOver (@mem1v _ L). by apply/prodvP=> u v; rewrite !mem_vspaceOver; apply: memvM. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq div) mathcomp(choice fintype tuple finfun bigop ssralg countalg) mathcomp(finalg zmodp matrix vector falgebra poly polydiv) mathcomp(mxpoly generic_quotient)