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Quantities characterizing semi-Fredholm operators and perturbation radii

Abstract: We show that none of the operational quantities that have been introduced to characterize the upper or the lower semi-Fredholm operators is equivalent to the corresponding perturbation radius.

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Authorship: González M., Martinón A.,

Fuente: Journal of Mathematical Analysis and Applications, 2012, 390(1), 362-367

Publisher: Academic Press Inc.

Publication date: 01/01/2012

No. of pages: 6

Publication type: Article

DOI: 10.1016/j.jmaa.2012.01.048

ISSN: 0022-247X,1096-0813

Spanish project: MTM2010-20190

Publication Url: https://doi.org/10.1016/j.jmaa.2012.01.048

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MANUEL GONZALEZ ORTIZ

MARTINÓN, ANTONIO

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Quantities characterizing semi-Fredholm operators and perturbation radii

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