proposition: Lemma rclosure_sclosure_eq_rsclosure : forall R, rclosure (sclosure R) = rsclosure R.
proof: Proof. Proof using. extens. intros x y. iff M. { destruct* M. { applys* rsclosure_of_sclosure. } } { induction* M. { applys* sym_inv. } } Qed.
imports: TLC(LibTactics LibLogic LibBool LibLogic LibProd LibSum)