Commit 75700c31 authored by Ralf Jung's avatar Ralf Jung
Browse files

add big_sepS_insert_2' and big_sepS_union_2

parent 2f1129aa
...@@ -2548,6 +2548,21 @@ Section gset. ...@@ -2548,6 +2548,21 @@ Section gset.
replace ({[x]} X) with X by set_solver. replace ({[x]} X) with X by set_solver.
auto. auto.
Qed. Qed.
Lemma big_sepS_insert_2' {Φ X} x
`{!TCOr (Affine (Φ x)) (Absorbing (Φ x))} :
Φ x - ([ set] y X, Φ y) - ([ set] y X {[ x ]}, Φ y).
Proof. rewrite comm_L. by apply big_sepS_insert_2. Qed.
Lemma big_sepS_union_2 {Φ} X Y `{! x, Affine (Φ x)} :
([ set] y X, Φ y) - ([ set] y Y, Φ y) - ([ set] y X Y, Φ y).
apply wand_intro_r.
rewrite -difference_union_L.
rewrite big_sepS_union; last set_solver.
apply sep_mono_l.
apply big_sepS_subseteq; first done.
Lemma big_sepS_delete_2 {Φ X} x : Lemma big_sepS_delete_2 {Φ X} x :
Affine (Φ x) Affine (Φ x)
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