From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Wed, 21 Mar 2012 18:26:35 +0000 (+0000)
Subject: wip exclusive haspatch - fix Simple / Coherence
X-Git-Tag: f0.3~27
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?p=topbloke-formulae.git;a=commitdiff_plain;h=2daa9f7411a0be9dfd8f1e762e46fc42d4e1c95a

wip exclusive haspatch - fix Simple / Coherence
---

diff --git a/simple.tex b/simple.tex
index 9b556ed..82b9076 100644
--- a/simple.tex
+++ b/simple.tex
@@ -63,7 +63,9 @@ $ D \isin C \equiv \ldots \lor \true \text{ so } D \haspatch C $.
 Ancestors: $ D \le C \equiv D \le L $.
 
 Contents: $ D \isin C \equiv D \isin L \lor f $
-so $ D \isin C \equiv D \isin L $.
+so $ D \isin C \equiv D \isin L $, i.e. $ C \zhaspatch P $.
+By $\haspatch$ for $L$, $\exists_{F \in \py} F \le L$
+and this $F$ is also $\le C$.  So $\haspatch$.
 
 So:
 \[ L \haspatch \p \implies C \haspatch \p \]