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BEST APPROXIMATION BY NORMAL MATRICES WITH SPECTRAL CONSTRAINTS |
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| Authors: | Dai Hua College of Science NUAA Yudao Street Nanjing P.R.China |
| Affiliation: | Dai Hua College of Science,NUAA29 Yudao Street,Nanjing 210016,P.R.China |
| Abstract: | The problem of best approximating, a given square complex matrix in the Frobenius norm by normal matrices under a given spectral restriction is considered. The ne cessary and sufficient condition for the solvability of the problem is given. A numerical algorithm for solving the problem is provided and a numerical example is presented. |
| Keywords: | normal matrices best approximation eigenvalues inverse problems spectral constraint |
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