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Complex analysis

  1. Mar 27, 2009 #1
    1. The problem statement, all variables and given/known data

    Hey guys.
    I have this question, I took it from a test.
    I need to check if there is an analytic function F(z) in this area (in the pic) that has this derivative (in the pic).

    http://img256.imageshack.us/img256/7826/25453238.jpg [Broken]

    Well, the derivative is analytic in this area, right?
    If the derivative is analytic, shouldn't F(z) be analytic and even more important, can it be that easy ?
    I'm not sure about the answer, I could really use some help.

    Thanks a lot.

    2. Relevant equations

    3. The attempt at a solution
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Mar 27, 2009 #2
    If F'(z) has an antiderivative in the set described, then its integral around any closed curve in that set will be zero. Are you sure that happens? Consider what form an antiderivative of F'(z) would have, and what functions would be involved.
  4. Mar 28, 2009 #3
    The antiderivative of F'(z) will probably involve Ln, and Ln is not analytic in this set.
    Is that what you mean?

    Thanks a lot.
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