Fri, 11 Feb 2011 13:30:37 +0000 included comments by Xingyuan
urbanc [Fri, 11 Feb 2011 13:30:37 +0000] rev 98
included comments by Xingyuan
Fri, 11 Feb 2011 12:13:35 +0000 slightly streamlined the proof
urbanc [Fri, 11 Feb 2011 12:13:35 +0000] rev 97
slightly streamlined the proof
(0) -30 -10 -2 +2 +10 +30 +100 tip