From 1b0eeef7759be1fc1f0f856166c4ee0eb3769ff8 Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Thu, 1 Mar 2012 00:11:46 +0000
Subject: [PATCH] define patch

---
 article.tex | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/article.tex b/article.tex
index ac351fb..0a41172 100644
--- a/article.tex
+++ b/article.tex
@@ -67,6 +67,13 @@ anticommits, the ``change made'' is only to be thought of as any
 conflict resolution.  This is not a partial order because it is not
 transitive.
 
+\item[ $ \p, \py, \pn $ ]
+A patch $\p$ consists of two sets of commits $\pn$ and $\py$, which
+are respectively the base and tip git branches.  $\p$ may be used
+where the context requires a set, in which case the statement
+is to be taken as applying to both $\py$ and $\pn$
+All these sets are distinct.
+
 \end{basedescript}
 
 \section{Invariants}
-- 
2.30.2