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JOURNALS // Matematicheskii Sbornik // Archive

Mat. Sb., 2021 Volume 212, Number 10, Pages 76–95 (Mi sm9444)

This article is cited in 2 papers

The regularized asymptotics of a solution of the Cauchy problem in the presence of a weak turning point of the limit operator

A. G. Eliseev

National Research University "Moscow Power Engineering Institute", Moscow, Russia

Abstract: An asymptotic solution of the linear Cauchy problem in the presence of a ‘weak’ turning point of the limit operator is built using Lomov's regularization method. The major singularities of the problem are written out in an explicit form. Estimates are given with respect to $\varepsilon$, which characterise the behaviour of the singularities as $\varepsilon\to 0$. The asymptotic convergence of the regularized series is proved. The results of the work are illustrated by an example.
Bibliography: 8 titles.

Keywords: singular Cauchy problem, asymptotic series, regularization method, turning point.

UDC: 517.928.2

MSC: 34E20

Received: 11.05.2020 and 07.10.2020

DOI: 10.4213/sm9444


 English version:
Sbornik: Mathematics, 2021, 212:10, 1415–1435

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© Steklov Math. Inst. of RAS, 2024