Computing the numerical range of Krein space operators

Computing the numerical range of Krein space operators

Consider the Hilbert space (H,〈• , •〉) equipped with the indefinite inner product[u,v]=v*J u,u,v∈ H, where J is an indefinite self-adjoint involution acting on H. The Krein space numerical range WJ(T) of an operator T acting on H is the set of all the values attained by the quadratic form [Tu,u], wi...

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Bibliographic Details
Main Authors: Bebiano Natalia, da Providência J., Nata A., da Providência J.P.
Format: Article
Language:English
Published: De Gruyter 2014-11-01
Series:Open Mathematics
Subjects:
indefinite inner product
krein space
numerical range
compression
Online Access:https://doi.org/10.1515/math-2015-0014

Internet

https://doi.org/10.1515/math-2015-0014

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