One-step extension of the Bergman shift
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- by Yong Bin Choi, Jin Kyu Han and Woo Young Lee
- Proc. Amer. Math. Soc. 128 (2000), 3639-3646
- DOI: https://doi.org/10.1090/S0002-9939-00-05516-7
- Published electronically: June 7, 2000
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Abstract:
In this paper we answer a question of Curto and Fialkow: there exists a quadratically hyponormal weighted shift which is not positively quadratically hyponormal.References
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Bibliographic Information
- Yong Bin Choi
- Affiliation: Department of Mathematics, Sungkyunkwan University, Suwon 440-746, Korea
- Jin Kyu Han
- Affiliation: Department of Mathematics Education, Mokwon University, Daejon 301-719, Korea
- Woo Young Lee
- Affiliation: Department of Mathematics, Sungkyunkwan University, Suwon 440-746, Korea
- MR Author ID: 263789
- Email: wylee@yurim.skku.ac.kr
- Received by editor(s): October 4, 1998
- Received by editor(s) in revised form: February 24, 1999
- Published electronically: June 7, 2000
- Additional Notes: This work was partially supported by the KOSEF through the GARC at Seoul National University and a research grant BSRI-1998-015-D00028.
- Communicated by: David R. Larson
- © Copyright 2000 American Mathematical Society
- Journal: Proc. Amer. Math. Soc. 128 (2000), 3639-3646
- MSC (1991): Primary 47B20, 47B37
- DOI: https://doi.org/10.1090/S0002-9939-00-05516-7
- MathSciNet review: 1694855