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Found 88 Documents (Results 1–88)

Numerical ranges of 4-by-4 nilpotent matrices: flat portions on the boundary. (English) Zbl 1365.15031

Bini, Dario A. (ed.) et al., Large truncated Toeplitz matrices, Toeplitz operators, and related topics. The Albrecht Böttcher anniversary volume. Basel: Birkhäuser/Springer (ISBN 978-3-319-49180-6/hbk; 978-3-319-49182-0/ebook). Operator Theory: Advances and Applications 259, 561-591 (2017).
MSC:  15A60 47A12
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Large truncated Toeplitz matrices, Toeplitz operators, and related topics. The Albrecht Böttcher anniversary volume. (English) Zbl 1367.47005

Operator Theory: Advances and Applications 259. Basel: Birkhäuser/Springer (ISBN 978-3-319-49180-6/hbk; 978-3-319-49182-0/ebook). xxvi, 740 p. (2017).
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On almost normal matrices. (English) Zbl 1391.15112

Fonseca, Carlos (ed.) et al., The Natália Bebiano anniversary volume. Special issue on the occasion of her 60th birthday. Coimbra: Universidade de Coimbra, Departamento de Matemática (ISBN 978-972-8564-48-3/pbk). Textos de Matemática 44, 131-144 (2013).
MSC:  15B57 15A60 15A27
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Convolution equations and singular integral operators. Selected papers of Israel Gohberg and Georg Heinig, Israel Gohberg and Nahum Krupnik. Transl. from the Russian by Oleksiy Karlovych. Edited by Leonid Lerer, Vadim Olshevsky and Ilya M. Spitkovsky. (English) Zbl 1218.00015

Operator Theory: Advances and Applications 206. Basel: Birkhäuser (ISBN 978-3-7643-8955-0/hbk). xxii, 217 p. (2010).
MSC:  00B50 15-06 47-06
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Noncanonical factorizations of almost periodic multivariable matrix functions. (English) Zbl 1079.47019

Böttcher, Albrecht (ed.) et al., Singular integral operators, factorization and applications. Proceedings of the 12th international workshop on operator theory and applications, IWOTA 2000, Faro, Portugal, September 12–15, 2000. Basel: Birkhäuser (ISBN 3-7643-6947-7/hbk). Oper. Theory, Adv. Appl. 142, 311-344 (2003).
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Abstract band method via factorization, positive and band extensions of multivariable almost periodic matrix functions, and spectral estimation. (English) Zbl 1017.47014

Mem. Am. Math. Soc. 762, 71 p. (2002).
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Factorization of piecewise constant matrix-valued functions with 3 points of discontinuity in \(L_{p,p}\) classes and some of its applications. (English. Russian original) Zbl 0696.15012

Sov. Math., Dokl. 40, No. 1, 80-85 (1990); translation from Dokl. Akad. Nauk SSSR 307, No. 1-6, 291-296 (1989).
Reviewer: G.P.Barker
MSC:  15A23 15A60 30E25
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