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when toggle format what by license comment
May 26, 2017 at 22:51 vote accept Lewi_Sol
May 26, 2017 at 18:26 comment added Fedor Petrov And since $z-z^n/n$ is univalent, this is sharp.
May 26, 2017 at 14:00 history answered T. Amdeberhan CC BY-SA 3.0