Recall from Section 14.3 that a function is called
Chapter 16, Problem 16.208(choose chapter or problem)
Recall from Section 14.3 that a function is called harmonic on if it satisfies Laplaces equation, that is, on . Use Greens first identity (with the same hypotheses as in Exercise 33) to show that if is harmonic on then . Here is the normal derivative of defined in Exercise 33.
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