Browsing School of Biological, Physical, Mathematics & Actuarial Sciences by Subject "Davis-Wielandt shell"
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On the similarities in properties of essential numerical range and Davis-Wielandt shell of Hilbert space operators
(International Journal of Innovative Research and Advanced Studies (IJIRAS), 2017-07)Let be an operator on an infinite dimensional Hilbert space . Denote the essential numerical range of the operator by and the Davis-Wielandt shell of the operator by . We review the properties of the essential numerical ...