×

Found 420 Documents (Results 1–100)

Congruence of selfadjoint operators and transformations of operator-valued Nevanlinna functions. (English) Zbl 07523169

de Snoo, H. S. V. (ed.) et al., Contributions to mathematics and statistics. Essays in honor of Seppo Hassi. Vaasa: University of Vaasa, School of Technology and Innovation. Acta Wasaensia 462, 1-14 (2021).
MSC:  47B25 47A48 47A56
PDF BibTeX XML Cite

All solutions to an operator Nevanlinna-Pick interpolation problem. (English) Zbl 1470.47017

Duduchava, Roland (ed.) et al., Operator theory in different settings and related applications, 26th international workshop on operator theory and its applications, IWOTA, Tbilisi, Georgia, July 6–10, 2015. Cham: Birkhäuser. Oper. Theory: Adv. Appl. 262, 139-220 (2018).
PDF BibTeX XML Cite
Full Text: DOI arXiv

On unimodular transformations of conservative \(L\)-systems. (English) Zbl 1402.81147

Alpay, Daniel (ed.) et al., Indefinite inner product spaces, Schur analysis, and differential equations. A volume dedicated to Heinz Langer. Cham: Birkhäuser (ISBN 978-3-319-68848-0/hbk; 978-3-319-68849-7/ebook). Operator Theory: Advances and Applications 263. Linear Operators and Linear Systems, 191-215 (2018).
PDF BibTeX XML Cite
Full Text: DOI arXiv

Nevanlinna’s characteristic functions with complex Hessian potential. (English) Zbl 1351.32006

Ibragimov, Zair (ed.) et al., Topics in several complex variables. First USA-Uzbekistan conference on analysis and mathematical physics, California State University, Fullerton, CA, USA, May 20–23, 2014. Proceedings. Providence, RI: American Mathematical Society (AMS) (ISBN 978-1-4704-1927-1/pbk; 978-1-4704-3001-6/ebook). Contemporary Mathematics 662, 97-105 (2016).
MSC:  32A22 31C10 32U05
PDF BibTeX XML Cite
Full Text: DOI

Realization of Herglotz-Nevanlinna functions by conservative systems. (English) Zbl 1435.47020

Alpay, Daniel (ed.), Operator theory. With 51 figures and 2 tables. In 2 volumes. Springer Reference. Basel: Springer. 779-809 (2015).
PDF BibTeX XML Cite
Full Text: DOI

On the unitary equivalence of the proper extensions of a Hermitian operator and the Weyl function. (English. Russian original) Zbl 1285.47019

Math. Notes 91, No. 2, 302-307 (2012); translation from Mat. Zametki 91, No. 2, 316-320 (2012).
PDF BibTeX XML Cite
Full Text: DOI

Shining a Hilbertian lamp on the bidisk. (English) Zbl 1275.47029

Blasco, Óscar (ed.) et al., Topics in complex analysis and operator theory. Third winter school in complex analysis and operator theory, Valencia, Spain, February 2–5, 2010. Providence, RI: American Mathematical Society (AMS) (ISBN 978-0-8218-5275-0/pbk). Contemporary Mathematics 561, 49-65 (2012).
PDF BibTeX XML Cite
Full Text: DOI Link

Nevanlinna characteristics and defective values of the Weierstrass zeta function. (English. Russian original) Zbl 1244.30059

Ukr. Math. J. 63, No. 5, 838-841 (2011); translation from Ukr. Mat. Zh. 63, No. 5, 718-720 (2011).
MSC:  30D35 30D15
PDF BibTeX XML Cite
Full Text: DOI

Conservative realizations of Herglotz-Nevanlinna functions. (English) Zbl 1240.47001

Operator Theory: Advances and Applications 217. Basel: Birkhäuser (ISBN 978-3-7643-9995-5/hbk; 978-3-7643-9996-2/ebook). xviii, 528 p. (2011).
PDF BibTeX XML Cite
Full Text: DOI

Multivariable operator-valued Nevanlinna-Pick interpolation: a survey. (English) Zbl 1206.47019

Grobler, J.J. (ed.) et al., Operator algebras, operator theory and applications. Proceedings of the 18th international workshop on operator theory and applications (IWOTA), Potchefstroom, South Africa, July 3–6, 2007. Basel: Birkhäuser (ISBN 978-3-0346-0173-3/hbk; 978-3-0346-0174-0/ebook). Operator Theory: Advances and Applications 195, 1-72 (2010).
PDF BibTeX XML Cite
Full Text: arXiv

Filter Results by …

Document Type

Reviewing State

all top 5

Author

all top 5

Serial

all top 5

Year of Publication

all top 3

Main Field

Software