Suppose that f is holomorphic on the whole of C and suppose that |f(z)| < K|z|k for some real constant K > 0 and some positive integer k > 0. Prove that f is a polynomial function of degree at most k.

Advanced Engineering Mathematics
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ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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Suppose that f is holomorphic on the whole of C and suppose that |f(z)| < K|z|k
for some real constant K > 0 and some positive integer k > 0. Prove that f is a
polynomial function of degree at most k.
[Hint: Calculate the coefficients of z", n > k = 1, in the Taylor expansion of f
around 0].
6/9
Transcribed Image Text:Suppose that f is holomorphic on the whole of C and suppose that |f(z)| < K|z|k for some real constant K > 0 and some positive integer k > 0. Prove that f is a polynomial function of degree at most k. [Hint: Calculate the coefficients of z", n > k = 1, in the Taylor expansion of f around 0]. 6/9
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