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Math Help - Complex variable

  1. #1
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    Complex variable

    (z: complex variable)
    How do you get from |z| = p (radius)
    to |dz| = -i p dz/z ?

    Thanks
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  2. #2
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    Quote Originally Posted by yunc84 View Post
    (z: complex variable)
    How do you get from |z| = p (radius)
    to |dz| = -i p dz/z ?

    Thanks
    z = \rho e^{i \theta} for 0 \leq \theta < 2 \pi.
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