Hyponormal Toeplitz Operators with Matrix-Valued Circulant Symbols |
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| Authors: | In Sung Hwang Dong-O Kang Woo Young Lee |
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| Institution: | 1. Department of Mathematics, Sungkyunkwan University, Suwon, 440-746, Korea
2. Department of Mathematics, Seoul National University, Seoul, 151-742, Korea
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| Abstract: | In this paper we are concerned with the hyponormality of Toeplitz operators with matrix-valued circulant symbols. We establish a necessary and sufficient condition for Toeplitz operators with matrix-valued partially circulant symbols to be hyponormal and also provide a rank formula for the self-commutator. |
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