Graph
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Proof 52-56.Wed, 03 Apr 2013 22:49:39 -0400, by Steve Losh
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Proof 49-51.Wed, 03 Apr 2013 22:37:59 -0400, by Steve Losh
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Proof 42-48.Wed, 03 Apr 2013 22:29:26 -0400, by Steve Losh
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Proof 38-41.Wed, 03 Apr 2013 22:14:56 -0400, by Steve Losh
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Proof 32-37.Wed, 03 Apr 2013 22:05:04 -0400, by Steve Losh