Perturbation of the Spectra of Complex Symmetric Operators
FILOMAT(2021)
摘要
An operator T on a complex Hilbert space let is called complex symmetric if T has a symmetric matrix representation relative to some orthonormal basis for U. This paper focuses on the perturbation theory for the spectra of complex symmetric operators. We prove that each complex symmetric operator on a complex separable Hilbert space has a small compact perturbation being complex symmetric and having the single-valued extension property. Also it is proved that each complex symmetric operator on a complex separable Hilbert space has a small compact perturbation being complex symmetric and satisfying generalized Weyl's theorem.
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关键词
Complex symmetric operators, Weyl's theorem, single-valued extension property, local spectral theory
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