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Aug 15, 2017 at 22:35 vote accept Ali Taghavi
Aug 14, 2017 at 19:45 comment added Mark Grant @AliTaghavi: Oops, my mistake. No, I don't think so. I've corrected this and another mistake (I'd used $w^{-1}=\bar{w}/|w|$ instead of $w^{-1}=\bar{w}/|w|^2$ before).
Aug 14, 2017 at 19:43 history edited Mark Grant CC BY-SA 3.0
corrected argument
Aug 14, 2017 at 19:05 comment added Ali Taghavi Thank you for your answer. Is $ \overline{P(z)} = P(\overline{z})$ essential in your argument? The coefficients are not necessarily real
Aug 14, 2017 at 19:00 history answered Mark Grant CC BY-SA 3.0