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Found 33 Documents (Results 1–33)

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\(Q\)-functions and boundary triplets of nonnegative operators. (English) Zbl 06767990

Alpay, Daniel (ed.) et al., Recent advances in inverse scattering, Schur analysis and stochastic processes. A collection of papers dedicated to Lev Sakhnovich. Cham: Birkhäuser/Springer. Oper. Theory: Adv. Appl. 244, 89-130 (2015).
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Some remarks on the Krein-von Neumann extension of different Laplacians. (English) Zbl 1343.47031

Banasiak, Jacek (ed.) et al., Semigroups of operators – theory and applications. Selected papers based on the presentations at the conference, Bȩdlewo, Poland, October 6–10, 2013. Cham: Springer (ISBN 978-3-319-12144-4/hbk; 978-3-319-12145-1/ebook). Springer Proceedings in Mathematics & Statistics 113, 69-87 (2015).
MSC:  47B25 35J05
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Nonnegative extensions via embeddings. (English) Zbl 1192.47020

Behrndt, Jussi (ed.) et al., Recent advances in operator theory in Hilbert and Krein spaces. Papers of the 7th workshop on operator theory in Krein spaces and spectral analysis, TU Berlin, Germany, December 13–16, 2007. Dedicated to Peter Jonas. Basel: Birkhäuser (ISBN 978-3-0346-0179-5/hbk; 978-3-0346-0180-1/ebook). Operator Theory: Advances and Applications 198, 171-183 (2010).
MSC:  47B25 47B65
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Extremal extensions of nonnegative linear relations. (English) Zbl 1107.47003

Proceedings of the algorithmic information theory conference, Vaasa, Finland, May 16–18, 2005. Vaasa: Vaasan Yliopisto (ISBN 952-476-124-6/pbk). Vaasan Yliopiston Julkaisuja. Selvityksiä ja Raportteja 124, 57-66 (2005).
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On the Friedrichs and the Kreĭn–von Neumann extension of nonnegative relations. (English) Zbl 1096.47004

Laaksonen, Matti (ed.) et al., Contributions to management science, mathematics and modelling. Essays in honour of Professor Ilkka Virtanen. Vaasa: Universitas Wasaensis (ISBN 952-476-033-9). Acta Wasaensia 122, Mathematics 9, 37-54 (2004).
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On the class of extremal extensions of a nonnegative operator. (English) Zbl 0996.47029

Kérchy, László (ed.) et al., Recent advances in operator theory and related topics. The Béla Szőkefalvi-Nagy memorial volume. Proceedings of the memorial conference, Szeged, Hungary, August 2-6, 1999. Basel: Birkhäuser. Oper. Theory, Adv. Appl. 127, 41-81 (2001).
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