fix a typo

diff --git a/article.tex b/article.tex
index b0a14f254ff6a6835b0269593c733b6854f21e67..c705f61c638523e676692f6abd367e51d2e82cd4 100644 (file)
--- a/article.tex
+++ b/article.tex
@@ -408,7 +408,7 @@ $A \le R \equiv A \le \baseof{R}$.
 
 But by Tip Merge condition on $\baseof{R}$,
 $A \le \baseof{L} \implies A \le \baseof{R}$, so
-$A \le \baseof{R} \lor A \le \baseof{R} \equiv A \le \baseof{R}$.
+$A \le \baseof{R} \lor A \le \baseof{L} \equiv A \le \baseof{R}$.
 Thus $A \le C \equiv A \le \baseof{R}$.  Ie, $\baseof{C} =
 \baseof{R}$.