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Spectral estimates and basis properties for self-adjoint block operator matrices

journal contribution
posted on 2023-06-08, 18:46 authored by Michael Strauss
In the first part of this manuscript a relationship between the spectrum of self-adjoint operator matrices and the spectra of their diagonal entries is found. This leads to enclosures for spectral points and in particular, enclosures for eigenvalues. We also consider graph invariant subspaces, and their corresponding angular operators. The existence of a bounded angular operator leads to basis properties of the first component of eigenvectors of operator matrices for which the corresponding eigenvalues lie in a half line. The results are applied to an example from magnetohydrodynamics.

History

Publication status

  • Published

Journal

Integral Equations and Operator Theory

ISSN

0378-620X

Publisher

Springer

Issue

2

Volume

67

Page range

257-277

Department affiliated with

  • Mathematics Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2014-10-22

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