proposition: Lemma rtclosure_sclosure_eq_rstclosure : forall R, rtclosure (sclosure R) = rstclosure R.
proof: Proof. Proof using. extens. intros x y. iff M. { induction* M. { applys* rstclosure_of_sclosure. } } { induction* M. { applys* sym_inv. } } Qed.
imports: TLC(LibTactics LibLogic LibBool LibLogic LibProd LibSum)