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On the spectral multiplicity of a direct sum of operators

Volume 104 / 2006

M. T. Karaev Colloquium Mathematicum 104 (2006), 105-112 MSC: Primary 47B38. DOI: 10.4064/cm104-1-7

Abstract

We calculate the spectral multiplicity of the direct sum $T\oplus A$ of a weighted shift operator $T$ on a Banach space $Y$ which is continuously embedded in $l^{p}$ and a suitable bounded linear operator $A$ on a Banach space $X$.

Authors

  • M. T. KaraevSuleyman Demirel University
    Department of Mathematics
    32260 Isparta, Turkey
    e-mail

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