Commit db003ba1 authored by Robbert Krebbers's avatar Robbert Krebbers
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More rules and derived rules for the logic.

parent 1e2d180b
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......@@ -83,6 +83,8 @@ Proof. rewrite (commutative _ x); apply ra_valid_op_l. Qed.
(** ** Units *)
Lemma ra_unit_r x : x unit x x.
Proof. by rewrite (commutative _ x), ra_unit_l. Qed.
Lemma ra_unit_unit x : unit x unit x unit x.
Proof. by rewrite <-(ra_unit_idempotent x) at 2; rewrite ra_unit_r. Qed.
(** ** Order *)
Lemma ra_included_spec x y : x y z, y x z.
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