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Elementary proofs for some results on the circular symmetry of the numerical range |
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| Authors: | Wai-Shun Cheung Chi-Kwong Li |
| Affiliation: | 1. Department of Mathematics , University of Hong Kong , Hong Kong cheungwaishun@gmail.com;3. Department of Mathematics , College of William and Mary , Williamsburg , VA 23187 , USA |
| Abstract: | |
| Keywords: | numerical range unit disk |