proposition: Lemma Full_set_spec: forall A (v: A), Full_set A v <-> True.
proof: Proof. intros. split; intros; constructor. Qed.
imports: Coq.Classes.Morphisms Coq.Classes.Equivalence Coq.Sets.Ensembles Coq.Sets.Constructive_sets CertiGraph.lib.Coqlib CertiGraph.lib.EquivDec_ext