@Article{Otieno2007,
author = "Otieno, Mourice Ouma",
title = "On quasi-similarity and ω-hyponormal operators",
journal = "Opuscula Math.",
year = "2007",
volume = "27",
number = "1",
pages = "73--81",
doi = "http://dx.doi.org/10.7494/OpMath.2007.27.1.73",
url = "http://dx.doi.org/10.7494/OpMath.2007.27.1.73",
abstract = "In this paper, it is shown that a Putnam-Fuglede type commutativity theorem holds for \(\omega\)-hyponormal operators, the normal parts of quasi-similar \(\omega\)-hyponormal operators are unitarily equivalent and a \(\omega\)-hyponormal spectral operator is normal.",
keywords = "\(\omega\)-hyponormal operators, quasi-similarity",
issn = "1232-9274"
}