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JOURNALS // Matematicheskii Sbornik // Archive

Mat. Sb., 2009 Volume 200, Number 8, Pages 3–24 (Mi sm6360)

This article is cited in 16 papers

Wiener-Hopf factorization of piecewise meromorphic matrix-valued functions

V. M. Adukov

South Ural State University

Abstract: Let $\mathrm D^+$ be a multiply connected domain bounded by a contour $\Gamma$, let $\mathrm D^-$ be the complement of $\mathrm D^+\cup\Gamma$ in $\overline{\mathbb C}={\mathbb C}\cup\{\infty\}$, and $a(t)$ be a continuous invertible matrix-valued function on $\Gamma$ which can be meromorphically extended into the open disconnected set $\mathrm D^-$ (as a piecewise meromorphic matrix-valued function). An explicit solution of the Wiener-Hopf factorization problem for $a(t)$ is obtained and the partial factorization indices of $a(t)$ are calculated. Here an explicit solution of a factorization problem is meant in the sense of reducing it to the investigation of finitely many systems of linear algebraic equations with matrices expressed in closed form, that is, in quadratures.
Bibliography: 15 titles.

Keywords: Wiener-Hopf factorization of matrix-valued functions, Riemann boundary-value problem, partial indices.

UDC: 517.544.8

MSC: Primary 47A68, 30E25; Secondary 47A56, 35Q15

Received: 13.05.2008

DOI: 10.4213/sm6360


 English version:
Sbornik: Mathematics, 2009, 200:8, 1105–1126

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