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when toggle format what by license comment
Dec 6, 2015 at 19:51 history edited meh CC BY-SA 3.0
Added important new information.
Jul 29, 2010 at 0:30 comment added meh @JME I will try and get some references. As I said, it has been a while since I was looking at these things.
Jul 26, 2010 at 12:44 comment added JME @aginensky Can you please add some references to your answer? Where is it phrased as an unsolved problem? Who made the conjecture?
Jul 24, 2010 at 22:21 history answered meh CC BY-SA 2.5