Discrete spectra for some complex infinite band matrices
Under suitable assumptions the eigenvalues for an unbounded discrete operator \(A\) in \(l_2\), given by an infinite complex band-type matrix, are approximated by the eigenvalues of its orthogonal truncations. Let \[\Lambda (A)=\{\lambda \in {\rm Lim}_{n\to \infty} \lambda _n : \lambda _n \text{ i...
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| Format: | article |
| Langue: | EN |
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AGH Univeristy of Science and Technology Press
2021
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| Accès en ligne: | https://doi.org/10.7494/OpMath.2021.41.6.861 https://doaj.org/article/352e3db55dc74e42a73b119562036eb7 |
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