proposition: Fact aspace1_subproof : is_aspace 1.
proof: Proof. by rewrite /is_aspace prod1v -memvE has_algid1 memv_line. 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)