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when toggle format what by license comment
Oct 3, 2018 at 17:18 history edited Vadim Ogranovich CC BY-SA 4.0
added existence of a proof for n=5
Oct 3, 2018 at 17:05 history edited Martin Sleziak CC BY-SA 4.0
removed double dollars - which cause the big gap at the beginning of the post
Oct 3, 2018 at 17:02 history asked Vadim Ogranovich CC BY-SA 4.0