Section EUTTG_Properties1.
Context {E : Type -> Type} {R1 R2 : Type} (RR : R1 -> R2 -> Prop).
Local Notation euttG := (@euttG E R1 R2 RR).

Lemma transD_flip r:
flip (transD (flip RR) (flip r)) <2= @transD E _ _ RR r.