fact: Definition disjoint (A B : Type) (E : list (X.t*A)) (F : list (X.t*B)) : Prop := inter (dom E) (dom F) [<=] empty.
imports: Coq.FSets.FSets Coq.Lists.List Coq.Logic.Decidable Coq.Strings.String String Metalib.CoqFSetDecide Metalib.CoqListFacts Metalib.LibTactics Metalib.CoqFSetInterface Coq.Classes.Equivalence Coq.Classes.EquivDec Metalib.CoqEqDec