From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Mon, 12 Mar 2012 16:03:36 +0000 (+0000)
Subject: create base: strengthen create acyclic condition
X-Git-Tag: f0.2~43
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?p=topbloke-formulae.git;a=commitdiff_plain;h=a4160f5fbb014fc2a7523e962996b0a35fdcc161

create base: strengthen create acyclic condition
---

diff --git a/article.tex b/article.tex
index a7b2709..f7ce2c2 100644
--- a/article.tex
+++ b/article.tex
@@ -537,7 +537,7 @@ Given $L$, create a Topbloke base branch initial commit $B$.
  \patchof{L} = \pa{L} \lor \patchof{L} = \bot
 }\]
 \[ \eqn{ Create Acyclic }{
- L \not\haspatch \pq
+ \pendsof{L}{\pqy} = \{ \}
 }\]
 
 \subsection{No Replay}
@@ -555,7 +555,8 @@ Not applicable.
 \subsection{Base Acyclic}
 
 Consider some $D \isin B$.  If $D = B$, $D \in \pqn$.
-If $D \neq B$, $D \isin L$, and by Create Acyclic
+If $D \neq B$, $D \isin L$, so by No Replay $D \le L$
+and by Create Acyclic
 $D \not\in \pqy$.  $\qed$
 
 \subsection{Coherence and Patch Inclusion}