Tue, 14 Feb 2012 02:24:09 +0000 urbanc key lemma
Tue, 14 Feb 2012 00:27:47 +0000 urbanc fixed 1st paragraph
Tue, 14 Feb 2012 00:11:17 +0000 urbanc 1st paragraph
Mon, 13 Feb 2012 23:50:37 +0000 urbanc 1st paragraph
Mon, 13 Feb 2012 23:31:40 +0000 urbanc polished implementation
Mon, 13 Feb 2012 22:45:06 +0000 zhang Line numbers added.
Mon, 13 Feb 2012 22:17:54 +0000 urbanc conclusion done
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