fact: Fixpoint T1is_succ alpha := match alpha with | zero => false | cons zero _ _ => true | cons _alpha _n beta => T1is_succ beta end.
imports: Coq(Arith Max Bool Lia Compare_dec Relations Ensembles Wellfounded Bool RelationClasses Operators_Properties ArithRing Logic.Eqdep_dec) hydras(More_Arith Restriction DecPreOrder) hydras(OrdNotations)