proposition: Lemma ssubrStar : forall r s, ssubr (Star r) (Star s) = ssubr r s.
proof: Proof. by move => r s /=. Qed.
imports: Coq(RelationClasses Setoid Morphisms Permutation) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq fintype) mathcomp(bigop path) RegLang(languages) RegexpBrzozowski(regexp finite_der equiv)