Graph

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Proof 19-20.
Fri, 16 Nov 2012 20:17:06 -0500, by Steve Losh
Proof 17-18.
Thu, 15 Nov 2012 22:21:05 -0500, by Steve Losh
Proof 12-16
Sat, 10 Nov 2012 17:36:05 -0500, by Steve Losh
Proof 7-11
Sat, 10 Nov 2012 17:09:56 -0500, by Steve Losh
Proof 3-6
Sat, 10 Nov 2012 14:50:42 -0500, by Steve Losh
Proof 0-2
Sat, 10 Nov 2012 14:21:55 -0500, by Steve Losh
Tweaks.
Sat, 10 Nov 2012 13:45:43 -0500, by Steve Losh

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