fact: Definition disjoint (E : list (asn A B)) (F : list (asn A B)) : Prop := Subset (inter (dom E) (dom F)) empty.
imports: Coq.FSets.FSets Coq.Lists.List Coq.Logic.Decidable Metalib.CoqFSetDecide Metalib.CoqListFacts Metalib.LibTactics Metalib.MetatheoryAtom Metalib.LibTactics