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Iris
stdpp
Commits
3103b7bf
Commit
3103b7bf
authored
Feb 15, 2017
by
Robbert Krebbers
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Lemma for X ∪ Y ⊆ Z
↔
X ⊆ Z ∧ Y ⊆ Z.
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theories/collections.v
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@@ -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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