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Can you please help me with this question. Prove that if conjugate of $F$ is analytic in a neighborhood of $z_0$ in $C$ then $F$ reverses angles at $z_0$. Can anyone please explain that for me? what does it mean to reverse an angle here? Thanks in advance...

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    To prove it I can find the cauchy Riemman equatio for the conjugate, but then I`m not sure how to finish the proof. Any help?2012-09-18

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