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http://hdl.handle.net/10071/5623
acessibilidade
Title: Factorizations, Riemann–Hilbert problems and the corona theorem
Authors: Câmara, M. C.
Diogo, Cristina
Karlovich, Yu I.
Spitkovsky, I. M.
Issue Date: Dec-2012
Publisher: Oxford University Press
Abstract: The solvability of the Riemann–Hilbert boundary value problem on the real line is described in the case when its matrix coefficient admits a Wiener–Hopf-type factorization with bounded outer factors, but rather general diagonal elements of its middle factor. This covers, in particular, the almost periodic setting, when the factorization multiples belong to the algebra generated by the functions eλ(x)≔eiλx, λ∈ℝ. Connections with the corona problem are discussed. Based on those, constructive factorization criteria are derived for several types of triangular 2×2 matrices with diagonal entries e±λ and non-zero off diagonal entry of the form a−e−β+a+eν with ν, β≥0, ν+β>0 and a± analytic and bounded in the upper/lower half plane.
Description: WOS:000311668200010 (Nº de Acesso Web of Science)
Peer reviewed: Sim
URI: http://hdl.handle.net/10071/5623
ISSN: 0024-6107
Publisher version: The definitive version is available at Oxford: http://dx.doi.org/10.1112/jlms/jds033
Appears in Collections:DM-RI - Artigos em revistas científicas internacionais

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