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Nonlinear maps preserving numerical radius of indefinite skew products of operators |
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| Authors: | Jinchuan Hou Kan He Xiuling Zhang |
| Institution: | 1. Department of Mathematics, Shanxi University, Taiyuan 030006, PR China;2. Department of Applied Mathematics, Taiyuan University of Technology, Taiyuan 030024, PR China;3. Department of Mathematics, Shanxi Normal University, Linfen 041004, PR China |
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