proposition: Fact agenv_is_aspace U : is_aspace (agenv U).
proof: Proof. rewrite /is_aspace has_algid1; last by rewrite memvE agenvEl addvSl. by rewrite agenv_modl // [V in (_ <= V)%VS]agenvEl addvSr. 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)