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Found 25 Documents (Results 1–25)

On the Kreĭn-von Neumann and Friedrichs extension of positive operators. (English) Zbl 07523179

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, 165-178 (2021).
MSC:  47B25 47A20
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M. Kreĭn’s research on semi-bounded operators, its contemporary developments, and applications. (English) Zbl 1201.47026

Adamyan, Vadim (ed.) et al., Modern analysis and applications. The Mark Krein centenary conference. Volume 1: Operator theory and related topics. Papers based on invited talks at the international conference on modern analysis and applications, Odessa, Ukraine, April 9–14, 2007. Basel: Birkhäuser (ISBN 978-3-7643-9918-4/v.1; 978-3-7643-9919-1/ebook; 978-3-7643-9924-5/set). Operator Theory: Advances and Applications 190, 65-112 (2009).
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\(Q\)-functions of quasi-selfadjoint contractions. (English) Zbl 1111.47016

Langer, Matthias (ed.) et al., Operator theory and indefinite inner product spaces. Presented on the occasion of the retirement of Heinz Langer in the colloquium on operator theory, Vienna, March 2004. Basel: Birkhäuser (ISBN 3-7643-7515-9/hbk). Operator Theory: Advances and Applications 163, 23-54 (2006).
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Selected works. II: Banach spaces and operator theory. (Избранные труды. II: Банаховы пространства и теория операторов.) (Russian) Zbl 0945.01014

Kyiv: Instytut Matematyky NAN Ukrainy. 348 p. (1996).
MSC:  01A75 46-03 47-03
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