Use Eq. (13) to show that (x, y) = ln r is harmonic. 1 Af = frr

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Use Eq. (13) to show that ƒ(x, y) = ln r is harmonic.

1 Af = frr + fee + - fr 1 2


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Calculus

ISBN: 9781319055844

4th Edition

Authors: Jon Rogawski, Colin Adams, Robert Franzosa

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