On the slow growth of power series convergent in the unit disk |
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| Author | |
| Abstract |
We construct two power series $f(z)=\sum_{n=0}^\infty a_nz^n$
convergent in the unit disk with the maximum modulus
$M_f(r)=\max\{|f(z)|:|z|=r\}$ and the maximum term $\mu_f(r)=\max\{|a_n|r^n:n\ge
0\}$ such that
1) $a_n\not= O(1)$ $(n\to\infty)$, $\ln\mu_f(r)$ is a slowly growing function and $\ln M_f(r)$ is not slowly growing; 2) $a_n= O(1)$ $(n\to\infty)$, and $\ln M_f(r)$ is not a slowly growing function are constructed. |
| Keywords |
power series in the unit disk, maximum modulus, maximum term, slowly growing functions, growth of analytic functions, coefficients of power series, complex analysis, asymptotic growth of functions
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| DOI |
doi:10.30970/ms.16.2.217-221
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Reference |
1. Sheremeta M.M., Zabolotskyi M.V. Slow growth of power series convergent in the unit disk, Mat. Studii, 11 (1999), no. 2, 221–224.
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| Pages |
217-221
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| Volume |
16
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| Issue |
2
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| Year |
2001
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| Journal |
Matematychni Studii
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| Full text of paper | |
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