From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Fri, 16 Mar 2012 22:34:19 +0000 (+0000)
Subject: merge fixes/clarifications - clarify and fix tip contents R \in \py
X-Git-Tag: f0.2~10
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?p=topbloke-formulae.git;a=commitdiff_plain;h=5d0609c1fcad5f04f3dbac80335577173d038ce4

merge fixes/clarifications - clarify and fix tip contents R \in \py
---

diff --git a/merge.tex b/merge.tex
index f503821..fd45642 100644
--- a/merge.tex
+++ b/merge.tex
@@ -233,14 +233,16 @@ By Tip Contents
 $D \isin L \equiv D \isin \baseof{L}$ and
 $D \isin R \equiv D \isin \baseof{R}$.
 
+Apply Tip Merge condition.
 If $\baseof{L} = M$, trivially $D \isin M \equiv D \isin \baseof{L}.$
 Whereas if $\baseof{L} = \baseof{M}$, by definition of $\base$,
 $\patchof{M} = \patchof{L} = \py$, so by Tip Contents of $M$,
 $D \isin M \equiv D \isin \baseof{M} \equiv D \isin \baseof{L}$.
 
-So $D \isin M \equiv D \isin L$ and by $\merge$,
+So $D \isin M \equiv D \isin L$ so by $\merge$,
 $D \isin C \equiv D \isin R$.  But from Unique Base,
-$\baseof{C} = R$ so $D \isin C \equiv D \isin \baseof{C}$.  OK.
+$\baseof{C} = \baseof{R}$.
+Therefore $D \isin C \equiv D \isin \baseof{C}$.  OK.
 
 $\qed$