proposition: Lemma uniq_one_1 : uniq (one (VarAsn B x b)).
proof: Proof. clear. rewrite_asnlist ((one (VarAsn B x b)) ++ nil). apply uniq_push; [ apply uniq_nil | fsetdec ]. Qed.
imports: Coq.FSets.FSets Coq.Lists.List Coq.Logic.Decidable Metalib.CoqFSetDecide Metalib.CoqListFacts Metalib.LibTactics Metalib.MetatheoryAtom Metalib.LibTactics