Section eqit_h.
Context {E : Type -> Type} {R1 R2 : Type} (RR : R1 -> R2 -> Prop).
(** [eqit] is a congruence for [itree] constructors. *)

Lemma eqit_Tau b1 b2 (t1 : itree E R1) (t2 : itree E R2) :
eqit RR b1 b2 (Tau t1) (Tau t2) <-> eqit RR b1 b2 t1 t2.