Zarantonello, E. H. The closure of the numerical range contains the spectrum. (English) Zbl 0137.32501 Bull. Am. Math. Soc. 70, 781-787 (1964). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 3 ReviewsCited in 30 Documents Keywords:functional analysis PDF BibTeX XML Cite \textit{E. H. Zarantonello}, Bull. Am. Math. Soc. 70, 781--787 (1964; Zbl 0137.32501) Full Text: DOI OpenURL References: [1] Marshall Harvey Stone, Linear transformations in Hilbert space, American Mathematical Society Colloquium Publications, vol. 15, American Mathematical Society, Providence, RI, 1990. Reprint of the 1932 original. · Zbl 0005.40003 [2] P. A. Alexandroff, Combinatorial topology, Graylock, Rochester, N. Y., 1956. · Zbl 0070.17902 [3] Felix E. Browder, Remarks on nonlinear functional equations, Proc. Nat. Acad. Sci. U.S.A. 51 (1964), 985 – 989. · Zbl 0126.12301 This reference list is based on information provided by the publisher or from digital mathematics libraries. Its items are heuristically matched to zbMATH identifiers and may contain data conversion errors. It attempts to reflect the references listed in the original paper as accurately as possible without claiming the completeness or perfect precision of the matching.