k-hyponormality of powers of weighted shifts via Schur products

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We characterize $k$-hyponormality and quadratic hyponormality of powers of weighted shifts using Schur product techniques.
9 pages

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Functional Analysis, 47B37; 47B20

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http://salesiana.dossiersoluciones.com/handle/123456789/64473

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/math/0207066
 http://arxiv.org/abs/math/0207066
 Proc. Amer. Math. Soc. 131(2003), 2761-2769

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arXiv