proposition: Lemma monalgOver0 S: 0 \is a monalgOver S.
proof: Proof. by rewrite qualifE /= msupp0; apply/allP. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat) mathcomp(seq path choice finset fintype finfun) mathcomp(tuple bigop ssralg ssrint ssrnum) xfinmap