Commuting unitary Hilbert space extensions of a pair of Kreĭn space isometries and the Kreĭn-Langer problem in the band

DOI10.1006/JFAN.1996.0069zbMath0866.47031OpenAlexW2006832481MaRDI QIDQ1918974

María Dolores Morán, Stefania A. M. Marcantognini

Publication date: 24 July 1997

Published in: Journal of Functional Analysis (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1006/jfan.1996.0069

zbMATH Keywords

unitary operatorsdilationsPontryagin spacesHilbert defect subspacesKrein space isometriesunitary Hilbert space extensions

Mathematics Subject Classification ID

Spaces with indefinite inner product (Kre?n spaces, Pontryagin spaces, etc.) (46C20) Linear operators on spaces with an indefinite metric (47B50)

Related Items (2)

On extensions of indefinite functions defined on a rectangle ⋮ The Kreĭn-Langer problem for Hilbert space operator valued functions on the band

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