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Problemy Analiza — Issues of Analysis, 2021, Volume 10(28), Issue 3, Pages 71–90
DOI: https://doi.org/10.15393/j3.art.2021.10970
(Mi pa332)
 

This article is cited in 2 scientific papers (total in 2 papers)

Smirnov's inequality for polynomials having zeros outside the unit disc

E. G. Kompaneets, V. V. Starkov

Petrozavodsk State University, 33 Lenina pr., Petrozavodsk 185910, Russia
Full-text PDF (546 kB) Citations (2)
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Abstract: In 1887, the famous chemist D. I. Mendeleev posed the following problem: to estimate $|f'(x)|$ for a real polynomial $f(x)$, satisfying the condition $|f(x)|\leq M$ on $[a, b]$. This question arose when Mendeleev was studying aqueous solutions. The problem was solved by the famous mathematician A. A. Markov, and over the following 100 years was repeatedly modified and extended. For complex polynomials, important inequalities were obtained by S. N. Bernstein and V. I. Smirnov. Many other well-known mathematicians, such as Ch. Pommerenke, G. Szegö, Q. I. Rahman, G. Schmeisser, worked in this subject. Almost all results in this direction significantly use the following condition: all zeros of a majorizing polynomial belong to the closed unit disc. In this paper, we remove this condition. Here a majorizing polynomial may have zeros outside the unit disc. This allows to extend the inequalities of Bernstein and Smirnov.
Keywords: polynomial, the Smirnov inequality, the Bernstein inequality.
Received: 11.09.2021
Revised: 28.09.2021
Accepted: 23.10.2021
Bibliographic databases:
Document Type: Article
UDC: 517.53
MSC: 30C10, 30A10
Language: English
Citation: E. G. Kompaneets, V. V. Starkov, “Smirnov's inequality for polynomials having zeros outside the unit disc”, Probl. Anal. Issues Anal., 10(28):3 (2021), 71–90
Citation in format AMSBIB
\Bibitem{KomSta21}
\by E.~G.~Kompaneets, V.~V.~Starkov
\paper Smirnov's inequality for polynomials having zeros outside the unit disc
\jour Probl. Anal. Issues Anal.
\yr 2021
\vol 10(28)
\issue 3
\pages 71--90
\mathnet{http://mi.mathnet.ru/pa332}
\crossref{https://doi.org/10.15393/j3.art.2021.10970}
\isi{https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=Publons&SrcAuth=Publons_CEL&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=000719872900006}
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  • https://www.mathnet.ru/eng/pa/v28/i3/p71
  • This publication is cited in the following 2 articles:
    Citing articles in Google Scholar: Russian citations, English citations
    Related articles in Google Scholar: Russian articles, English articles
    Problemy Analiza — Issues of Analysis
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