Abstract
In this paper, we show that ifT is a ω-hyponormal operator, thenT 2 is also ω-hyponormal.
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Chō, M., Huruya, T. Square of ω-hyponormal operators. Integr equ oper theory 39, 413–420 (2001). https://doi.org/10.1007/BF01203322
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DOI: https://doi.org/10.1007/BF01203322