fact: Fixpoint Inl_notl' (l l': seq A) : bool := match l with | [::] => false | hd :: tl => match InA l' hd with | true => Inl_notl' tl l' | false => true end end.
imports: Coq(RelationClasses Setoid Morphisms SetoidList Mergesort Permutation) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq fintype) mathcomp(bigop path) RegexpBrzozowski(glue)