A remark on the d-characteristic and the -characteristic of linear operators in a Banach space
Štefan Schwabik (1973)
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Štefan Schwabik (1973)
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Vladimir Rakočević, Jaroslav Zemánek (1988)
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Jaroslav Zemánek (1984)
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Kôsaku Yosida (1983)
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R. Rao Chivukula, I. Ramabhadra Sarma (1983)
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Ivan Singer (1973)
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Tadeusz Iwaniec (1983)
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Bruce Barnes (1992)
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Let ℬ be a Banach algebra of bounded linear operators on a Banach space X. If S is a closed operator in X such that (λ - S)^{-1} ∈ ℬ for some number λ, then S is affiliated with ℬ. The object of this paper is to study the spectral theory and Fredholm theory relative to ℬ of an operator which is affiliated with ℬ. Also, applications are given to semigroups of operators which are contained in ℬ.
Janusz Woś (1982)
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(1981)
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M. Schechter, Robert Whitley (1988)
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A. Taylor (1963)
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