K-numerical ranges of operators on Hilbert spaces
The concept of k-numerical range for an operator on a Hilbert space wan originally suggested by P.R. Halmos as a suitable generalization of the spatial numerical range of such an operator. Hero k is a natural number, and the spatial numerical range corresponds to the case where k = 1. The well-known...
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Swansea University
1978
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| Online Access: | http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.638294 |