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Sums of Idempotents in Banach Algebras

Published online by Cambridge University Press:  20 November 2018

N. J. Kalton
N. J. Kalton*
Affiliation:
Department of Mathematics, University of Missouri-Columbia, ColumbiaMO. 65211
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Abstract

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We prove that the sum of two idempotents is in a Banach algebra is itself an idempotent if and only if it is power-bounded.

Keywords

46H05
Type
Research Article
Information
Canadian Mathematical Bulletin , Volume 31 , Issue 4 , 01 December 1988 , pp. 448 - 451
Copyright
Copyright © Canadian Mathematical Society 1988

References

1. Boas, R. P., Entire Functions Academic Press, New York, 1954.Google Scholar
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