Commit 15fd682e authored by Ralf Jung's avatar Ralf Jung
Browse files

updates preserve being Absorbing

parent ff2b1d90
......@@ -240,6 +240,10 @@ Section bupd_derived.
by rewrite -bupd_intro -or_intro_l.
Global Instance bupd_absorbing P :
Absorbing P Absorbing (|==> P).
Proof. rewrite /Absorbing /bi_absorbingly bupd_frame_l =>-> //. Qed.
Section bupd_plainly.
Context `{!BiPlainly PROP, !BiBUpdPlainly PROP}.
......@@ -326,6 +330,10 @@ Section fupd_derived.
Lemma fupd_wand_r E1 E2 P Q : (|={E1,E2}=> P) (P - Q) ={E1,E2}= Q.
Proof. by rewrite fupd_frame_r wand_elim_r. Qed.
Global Instance fupd_absorbing E1 E2 P :
Absorbing P Absorbing (|={E1,E2}=> P).
Proof. rewrite /Absorbing /bi_absorbingly fupd_frame_l =>-> //. Qed.
Lemma fupd_trans_frame E1 E2 E3 P Q :
((Q ={E2,E3}= emp) |={E1,E2}=> (Q P)) ={E1,E3}= P.
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