The closure of the numerical range contains the spectrum

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1 January 1964

journal article
Published by American Mathematical Society (AMS) in Bulletin of the American Mathematical Society

Vol. 70 (6) , 781-787
https://doi.org/10.1090/s0002-9904-1964-11237-4

Abstract

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This publication has 2 references indexed in Scilit:

REMARKS ON NONLINEAR FUNCTIONAL EQUATIONS
Proceedings of the National Academy of Sciences, 1964
Linear Transformations in Hilbert Space and Their Applications to Analysis
Published by American Mathematical Society (AMS) ,1932