Korean Journal of Mathematics

The Kangwon-Kyungki Mathematical Society (강원경기수학회)
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ON THE NORM ATTAINING OPERATORS

  • Lee, Jun Ik (Department of Mathematics Education Sangmyung University)
  • Received : 2012.11.05
  • Accepted : 2012.12.15
  • Published : 2012.12.30
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Abstract

In this paper, we show the norm attaining paranormal operators have a nontrivial invariant subspace. Also, we show the norm attaining quadratically hyponormal weighted shift is subnormal.

Keywords

Acknowledgement

Supported by : Sangmyung University

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