fact: Definition j n (P : Pinf W) a (T' : Pinf W) : mem a P -> ~mem a T' -> T' [<=] P -> Pcard T' n -> Pcard P (S n).
imports: Coq(Morphisms Basics Setoid) CoLoR(ClassicUtil IotaUtil EpsilonUtil DepChoice LogicUtil SetUtil FinSet InfSet NatUtil)