Continuity of the spectrum on (classA)

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Let (classA)* denotes the class of operators satisfying ｜T2｜ ≥ ｜T*｜2. In this paper, we show that the spectrum is continuouson (classA)*.

Let (classA)* denotes the class of operators satisfying ｜T2｜ ≥ ｜T*｜2. In this paper, we show that the spectrum is continuouson (classA)*.

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