Commit 3103b7bf authored by Robbert Krebbers's avatar Robbert Krebbers

Lemma for X ∪ Y ⊆ Z X ⊆ Z ∧ Y ⊆ Z.

parent b8ffa59a
......@@ -338,6 +338,8 @@ Section simple_collection.
Proof. set_solver. Qed.
(** Union *)
Lemma union_subseteq X Y Z : X Y Z X Z Y Z.
Proof. set_solver. Qed.
Lemma not_elem_of_union x X Y : x X Y x X x Y.
Proof. set_solver. Qed.
Lemma elem_of_union_l x X Y : x X x X Y.
......
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