proposition: Lemma tclosure_rclosure_eq_rtclosure : forall R, tclosure (rclosure R) = rtclosure R.
proof: Proof. Proof using. extens. intros x y. iff M. { induction* M. { applys* rtclosure_of_rclosure. } } { induction* M. } Qed.
imports: TLC(LibTactics LibLogic LibBool LibLogic LibProd LibSum)