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On (n1,,nm)-hyponormal tuples of Hilbert space operators
AIMS Mathematics 2024, 9(10): 27784-27796
Published: 15 October 2024
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This paper introduces a new class of multivariable operators called (n1,,nm)-hyponormal tuples, which combine joint normal and joint hyponormal operators. A tuple of operators Q=(Q1,,Qm) is said to be an (n1,,nm)-hyponormal tuple for some (n1,,nm)Nm if

1k,lm[Qknk,Qlnl]ωkωl0,(ωk)1kmKm.

We show several properties of this class that correspond to the properties of joint hyponormal operators.

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