Bhatia, Rajendra ; Kittaneh, Fuad (1992) Approximation by positive operators Linear Algebra and its Applications, 161 . pp. 1-9. ISSN 0024-3795
Full text not available from this repository.
Official URL: http://dx.doi.org//10.1016/0024-3795(92)90001-Q
Related URL: http://dx.doi.org/10.1016/0024-3795(92)90001-Q
Abstract
If A = B + iC is a normal operator, where B, C are Hermitian, then in each unitarily invariant norm, the positive part of B is a best approximation to A from the class of positive operators. This generalizes results proved earlier by P. R. Halmos, T. Ando, and R. Bouldin for special norms. Some related results are included.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| ID Code: | 2593 |
| Deposited On: | 08 Oct 2010 07:14 |
| Last Modified: | 08 Oct 2010 07:14 |
Repository Staff Only: item control page
