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Aug 25, 2015 at 5:07 vote accept David Sun
Aug 25, 2015 at 6:46
Aug 9, 2015 at 15:59 history edited Fedor Petrov CC BY-SA 3.0
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Aug 9, 2015 at 15:32 comment added David Sun Thanks a lot Fedor! These nicely constructed lemmas finish the proof of the $n=3m$ case indeed! BTW, should "$a_{2m}$" in Lemma 1 be "$a_{m}$"?
Aug 9, 2015 at 13:34 history answered Fedor Petrov CC BY-SA 3.0