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Journal of Approximation Theory
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Journal of Approximation Theory
Article . 2007
License: Elsevier Non-Commercial
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Journal of Approximation Theory
Article . 2007 . Peer-reviewed
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Article . 2007
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On an extremal problem of Selberg II

On an extremal problem of Selberg. II.
Authors: Jyoichi Kaneko;

On an extremal problem of Selberg II

Abstract

Für \(p\in\mathbb{N}\) sei \(m_p\) das Minimum von \(\prod_{j=1}^p(1+y_j)\) unter den Bedingungen \((y_1,\dots,y_p)\in \mathbb{R}_+^p,\,\, \prod_{j=1}^py_j=e^{1-p},\,\, \prod_{1\leq i1\) strikt monoton wachsende, unbeschränkte Funktion \(\varphi_k(x):=x^k\log x-(x^k-1)\log(x-1)\) ein und beweist damit: Das simultane Gleichungssystem \(\varphi_1(s)-\varphi_1(t)=1, \varphi_2(s)+\varphi_2(t)-\varphi_2(s+t)=2\) hat in \(s>t>1\) genau eine Lösung \((s_0,t_0)\), die numerisch zu \(s_0=18,01280\dots, t_0=6,94819\dots\) berechnet wird. Eine direkte Anwendung der Euler-Maclaurinschen Summenformel auf Ergebnisse aus der o.g. Arbeit des Verf. liefert \(\lim_{p\rightarrow\infty}Q(p)= \varphi_1(s_0+t_0)-\varphi_1(s_0)\). Auf den Zusammenhang von \(m_p\) mit einem von A. Selberg (1941) behandelten Problem über ganze ganzwertige Funktionen ging die Besprechung der früheren Arbeit ein.

Related Organizations
Keywords

Jacobi polynomial, Mathematics(all), Numerical Analysis, Software, source code, etc. for problems pertaining to real functions, Applied Mathematics, Euler-Maclaurin summation formula, Special classes of entire functions of one complex variable and growth estimates, extremal problem, Analysis

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
1
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