Global Instance nil_rel:
  Monotonic (@nil) (forallr R, list_rel R).Global Instance list_subrel_params:
  Params (@list_rel) 3.

(* Specifications: *)
Lemma list_rel_refl `(HR: Reflexive): Reflexive (list_rel R).
Lemma list_rel_corefl `(HR: Coreflexive): Coreflexive (list_rel R).
Lemma list_rel_sym `(HR: Symmetric): Symmetric (list_rel R).
Lemma list_rel_trans `(HR: Transitive): Transitive (list_rel R).
Lemma fold_impl_rstep (A B: Prop): RStep (impl A B) (A -> B).