From 7fe9066e79d46cd3a7673301bb41fceda683f503 Mon Sep 17 00:00:00 2001
From: dos-reis <gdr@axiomatics.org>
Date: Sat, 12 Jun 2010 00:23:12 +0000
Subject: 	* algebra/tree.spad.pamphlet (node?$Tree): Fix thinko.

---
 src/algebra/tree.spad.pamphlet | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/algebra/tree.spad.pamphlet')

diff --git a/src/algebra/tree.spad.pamphlet b/src/algebra/tree.spad.pamphlet
index 7b659368..a4249665 100644
--- a/src/algebra/tree.spad.pamphlet
+++ b/src/algebra/tree.spad.pamphlet
@@ -111,7 +111,7 @@ Tree(S: SetCategory): T==C where
       distance1(t2, t1)
     node?(t1, t2) ==
       t1 = t2 => true
-      t case empty => false
+      t2 case empty => false
       "or"/[node?(t1, t) for t in children t2]
     leaf? t == 
       t case empty => false
-- 
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