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Sums of unitarily equivalent positive operators |
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| Authors: | Eun-Young Lee Jean-Christophe Bourin |
| Affiliation: | 1. Department of Mathematics, Kyungpook National University, Daegu 702-701, Republic of Korea;2. Laboratoire de mathématiques, Université de Franche-Comté, 25000 Besançon, France |
| Abstract: | Some simple conditions on positive operators A and K ensure that A can be written as a series in the unitary orbit of K. |
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