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Sep 11, 2015 at 0:21 vote accept Cameron Barbeau
Sep 10, 2015 at 23:56 comment added Gerhard Paseman The bound is reminiscent of Westzynthius (1931). A reference for this work can be found at mathoverflow.net/questions/37679 . Gerhard "And A Few Other Places" Paseman, 2015.09.10
Sep 10, 2015 at 23:28 history answered GH from MO CC BY-SA 3.0