P. O. Maina
School Of Mathematics, University Of Nairobi, P.o Box 30197, Nairobi, Kenya
Weyl Spectrum And Quasisimilarity Of W-hyponormal Operators
The task of looking for conditions under which two quasisimilar operators have equal spectra or essential spectra is quite evident in the extant literature of operator theory. However the case of equality of Weyl spectra for such operators is often overlooked. In this paper we strive to fill this gap by considering mainly the class of w- hyponormal operators and

P. O. Maina
School Of Mathematics, University Of Nairobi, P.o Box 30197, Nairobi, Kenya
Weyl's Spectrum And Quasisimilarity Of Dominant Operators
In this paper our tasks is twofold: First we investigate the conditions under which two quasi-similar dominant operators say and have equal Weyl spectrum. Secondly we look at the possibility of some classes of operators being quasi-similarity invariant.

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