fact: Axiom disjoint_app_2 : forall A B (E F : list (atom*A)) (G : list (atom*B)), disjoint (E ++ F) G -> disjoint F G.
imports: Coq.FSets.FSets Coq.Lists.List Coq.Logic.Decidable Metalib.CoqFSetDecide Metalib.CoqListFacts Metalib.AssocList Metalib.MetatheoryAtom Metalib.LibTactics