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when toggle format what by license comment
Aug 3, 2013 at 13:16 comment added H A Helfgott Thanks! It would still be interesting to get an optimal answer (or an example that shows that this one is optimal).
Aug 1, 2013 at 14:23 history edited Brendan Murphy CC BY-SA 3.0
improved formatting
Jul 31, 2013 at 22:59 history answered Brendan Murphy CC BY-SA 3.0