Browsing Faculty of Science & Technology (FST) by Author "Wafula, Arthur Wanyonyi"
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On invariance of the numerical range and some classes of operators in Hilbert spaces
Wafula, Arthur Wanyonyi (School of Mathematics, University of Nairobi, 2013)In this thesis the invariance of the numerical range under isometric similarity is examined. It is a well known fact that unitarily similar operators have the same numerical range. Chapter one is devoted to basic ...