Note on Near Subnormal Weighted Shifts

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In this note, necessary and sufficient conditions are obtained for unilateral weighted shifts to be near subnormal . As an application of the main results, many answers to the Hilbert space problem 160 are presented at the end of the paper.
5 pages

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Functional Analysis, 47B20, 47B37

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http://salesiana.dossiersoluciones.com/handle/123456789/66599

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/math/0302274
 http://arxiv.org/abs/math/0302274

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arXiv