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Homework Help: Complex analysis - maximum modulus & analytic function

  1. May 9, 2008 #1
    [SOLVED] complex analysis - maximum modulus & analytic function

    Hi all, I'm having difficulty figuring out how to do the following two problems in complex analysis. I need help!

    1. Consider the infinite strip -[tex]\pi[/tex]< Im z < [tex]\pi[/tex]. Does maximum modulus principle apply to this strip? Why or why not? (Hint: e[tex]^{i\pi}[/tex] = e[tex]^{-i\pi}[/tex] = 1)

    2. Show that if f(z) is analytic and Re f(z) is bounded in the complex plane, then f(z) is constant. What if Im f(z) is bounded? (Hint: Consider e[tex]^{f(z)}[/tex] and its absolute value)

    Thank you for your time and thank you for any help.
  2. jcsd
  3. May 9, 2008 #2


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    Science Advisor

    You are given hints and you haven't used them? What have YOU done on this? No one can help you if you don't show us what YOU know about these problems and where you are having difficulties.
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