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when toggle format what by license comment
Feb 18, 2020 at 14:10 history edited Martin Sleziak CC BY-SA 4.0
http -> https (the question has been bumped anyway)
May 25, 2010 at 4:00 comment added Victor Protsak It's staggering to learn that 2 does not have an easy decision procedure! I suppose that it has to do with diophantine properties of complex PF numbers (algebraic numbers with at least one conjugate with the same absolute value and none with larger).
Feb 15, 2010 at 2:55 history answered Richard Stanley CC BY-SA 2.5