fact: Fixpoint pp_size (exp : ppT1) : nat := match exp with PP_add e f | PP_exp e f => (S ((pp_size e) + (pp_size f)))%nat | PP_mult e _ => S (pp_size e) | _ => 1%nat 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)