fact: Definition rec_family A B (E:binary B) (P:A->Prop) (R:binary A) : family A (A->B) := Build_family (tclosure R) (fun x f1 f2 => forall x', P x' -> rclosure (tclosure R) x' x -> E (f1 x') (f2 x')).
imports: TLC(LibTactics LibLogic LibReflect LibEpsilon LibInt LibProd LibSum LibOperation LibRelation LibWf LibOrder LibMin)