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Some Properties of Entire Functions with Nonnegative Taylor Coefficients
S. Simich Mathematical Institute, Serbian Academy of Sciences and Arts
Abstract:
If $f$ is an entire function of arbitrary finite order and with nonnegative Taylor coefficients, then we prove that its restriction to the positive part of the real axis belongs to de Haan's class $\Gamma$. We also show that $f/f'$ is a Beurling slowly varying function.
Keywords:
entire function, regular variation, Beurling slow variation, de Haan's class $\Gamma$.
Received: 20.12.2005 Revised: 08.09.2006
Citation:
S. Simich, “Some Properties of Entire Functions with Nonnegative Taylor Coefficients”, Mat. Zametki, 81:5 (2007), 760–765; Math. Notes, 81:5 (2007), 681–685
Linking options:
https://www.mathnet.ru/eng/mzm3720https://doi.org/10.4213/mzm3720 https://www.mathnet.ru/eng/mzm/v81/i5/p760
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