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St. Petersburg Mathematical Journal

This journal is a cover-to-cover translation into English of Algebra i Analiz, published six times a year by the mathematics section of the Russian Academy of Sciences.

ISSN 1547-7371 (online) ISSN 1061-0022 (print)

The 2020 MCQ for St. Petersburg Mathematical Journal is 0.68.

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Homogenization of the first initial boundary-value problem for parabolic systems: operator error estimates
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by Yu. M. Meshkova and T. A. Suslina
Translated by: T. A. Suslina
St. Petersburg Math. J. 29 (2018), 935-978
DOI: https://doi.org/10.1090/spmj/1521
Published electronically: September 4, 2018

Abstract:

Let $\mathcal {O}\subset \mathbb {R}^d$ be a bounded domain of class $C^{1,1}$. In $L_2(\mathcal {O};\mathbb {C}^n)$, a selfadjoint matrix second order elliptic differential operator $B_{D,\varepsilon }$, $0<\varepsilon \leq 1$, is considered with the Dirichlet boundary condition. The principal part of the operator is given in a factorized form. The operator involves first and zero order terms. The operator $B_{D,\varepsilon }$ is positive definite; its coefficients are periodic and depend on $\mathbf {x}/\varepsilon$. The behavior of the operator exponential $e^{-B_{D,\varepsilon }t}$, $t>0$, is studied as $\varepsilon \rightarrow 0$. Approximations for the exponential $e^{-B_{D,\varepsilon }t}$ are obtained in the operator norm on $L_2(\mathcal {O};\mathbb {C}^n)$ and in the norm of operators acting from $L_2(\mathcal {O};\mathbb {C}^n)$ to the Sobolev space $H^1(\mathcal {O};\mathbb {C}^n)$. The results are applied to homogenization of solutions of the first initial boundary-value problem for parabolic systems.
References
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Bibliographic Information
  • Yu. M. Meshkova
  • Affiliation: Chebyshev Laboratory, St. Petersburg State University, 14 line V.O., 29B, St. Petersburg, 199178, Russia
  • Email: y.meshkova@spbu.ru
  • T. A. Suslina
  • Affiliation: Department of Physics, St. Petersburg State University, Ul′yanovskaya 3, Petrodvorets, 198504, St. Petersburg, Russia
  • Email: t.suslina@spbu.ru
  • Received by editor(s): July 21, 2017
  • Published electronically: September 4, 2018
  • Additional Notes: Supported by RFBR (grant no. 16-01-00087). The first author was supported by “Native Towns”, a social investment program of PJSC “Gazprom Neft”, by the “Dynasty” foundation, and by a Rokhlin scholarship.
  • © Copyright 2018 American Mathematical Society
  • Journal: St. Petersburg Math. J. 29 (2018), 935-978
  • MSC (2010): Primary 35B27
  • DOI: https://doi.org/10.1090/spmj/1521
  • MathSciNet review: 3723812