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This article is cited in 2 scientific papers (total in 2 papers)
An approximation theorem for entire functions of
exponential type and stability of zero sequences
B. N. Khabibullin Bashkir State University
Abstract:
Let $L$
be an entire function of exponential type
in $\mathbb C$ with indicator function $h_L$;
let
$\Lambda=\{\lambda_n\}$, $n=1,2,\dots$,
be a subsequence of
zeros of the entire function of exponential type
$L\not\equiv0$;
let $\Gamma=\{\gamma_n\}$
be a complex number sequence and assume that
$$
\sum_n\biggl|\frac1{\lambda_n}-\frac1{\gamma_n}\biggr|<\infty.
$$
A simple construction of a sequence of entire functions of
exponential type $\{L_n\}$ transforming $\Lambda$
into a subsequence $\Gamma$
of zeros of an entire function of exponential type
$G\not\equiv0$
such that $h_G=h_L$
is put forward
(an approximation theorem). This result is applied to stability
problems of zero sequences and non-uniqueness sequences
for spaces of entire functions of exponential type
with constraints on the indicators and to the
problem of the stability of the completeness property of
exponential systems in the space of germs of analytic
functions on a compact convex set.
Received: 30.08.2001 and 12.05.2003
Citation:
B. N. Khabibullin, “An approximation theorem for entire functions of
exponential type and stability of zero sequences”, Mat. Sb., 195:1 (2004), 143–156; Sb. Math., 195:1 (2004), 135–148
Linking options:
https://www.mathnet.ru/eng/sm797https://doi.org/10.1070/SM2004v195n01ABEH000797 https://www.mathnet.ru/eng/sm/v195/i1/p143
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Abstract page: | 549 | Russian version PDF: | 226 | English version PDF: | 4 | References: | 62 | First page: | 1 |
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