fact: Definition disjoint (A B : Type) (E : list (atom*A)) (F : list (atom*B)) : Prop := inter (dom E) (dom F) [<=] empty.
imports: Coq.FSets.FSets Coq.Lists.List Coq.Logic.Decidable Metalib.CoqFSetDecide Metalib.CoqListFacts Metalib.AssocList Metalib.MetatheoryAtom Metalib.LibTactics