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On the Normality of the Sum of Two Normal Operators |
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| Authors: | Mohammed Hichem Mortad |
| Affiliation: | 1. D??partement de Math??matiques, Universit?? d??Oran (Es-Senia), B.P. 1524, El Menouar, 31000, Oran, Algeria |
| Abstract: | The aim of this paper is to give sufficient conditions on two normal operators (bounded or not), defined on a Hilbert space, which make their algebraic sum normal. The results are accompanied by some interesting examples and counter examples. |
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