Applications of Harmonic Functions - Complex Analysis

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Question

If and are both analytic through a domain , which of the following is true?

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Answer

Since is analytic, the Cauchy-Riemann Equations give us

Since is analytic, the Cauchy-Riemann Equations give us .

Putting these two results together gives us

which implies that is constant. Similar reasoning gives is that is constant. This implies that must be constant throughout .

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