Graph
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Proof 17-18.Thu, 15 Nov 2012 22:21:05 -0500, by Steve Losh
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Proof 12-16Sat, 10 Nov 2012 17:36:05 -0500, by Steve Losh
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Proof 7-11Sat, 10 Nov 2012 17:09:56 -0500, by Steve Losh
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Proof 3-6Sat, 10 Nov 2012 14:50:42 -0500, by Steve Losh