journal article
oaidoi:10.1016/0024-3795(83)90107-6

Antieigenvalues: method of estimation and calculation

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Publication date
28 February 1983
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Published by Elsevier Inc.
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    Abstract

    AbstractLet T be a linear operator on a Hilbert space H. A method of estimation and calcu+lation of inf{Re(Tx,x)/‖Tx‖:xϵH, ‖x‖ = 1} as well as some other expressions containing two quadratic forms is proposed. This method is based on the Toeplitz- Hausdorff theorem on the convexity of the numerical range of any operator on H

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