fact: Definition eq_compat xs xs' ys':= forall x y y', In x xs -> In y xs' -> In y' ys' -> P x y -> P x y' -> y = y'.
imports: Coq(Transitive_Closure Compare_dec Relations Permutation Setoid Morphisms Basics Lia) CoLoR(RelExtras MultisetTheory ListPermutation MultisetCore ListExtras AccUtil LogicUtil)