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Complex Analysis Problem (analytic and harmonic functions)

Author:
November 8th, 2022

(a) Show that an analytic function f(z) defined in a simply connected domain Ω is constant if R(f(z)) (= the real part of f(z)) is constant throughout Ω.

(b) Let f(z) be analytic and non-vanishing in a domain Ω. Show that ln l f(z) l is a harmonic function in Ω.

Textbook:
“Fundamentals of Complex Analysis with Applications to Engineering, Science, and Mathematics” 3rd Edition, Saff and Snider, Prentice Hall.

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