The Peripheral Point Spectrum of Schwarz Operators on C*-Algebras.
Ulrich Groh (1981)
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Ulrich Groh (1981)
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Johann Walter (1972)
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Albert Schneider, Frank Mantlik (1990)
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Rainer Colgen (1981)
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Gh. Constantin (1975)
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John Piepenbrink (1974)
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Volker Vogelsang (1987)
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W. Arendt, H.H. Schaefer, M. Wolff (1978/79)
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Andreas M. Hinz (1987)
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Bucur, Amelia (1996)
General Mathematics
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C.R. Putnam (1968)
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C.R. Putnam (1970)
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Benharrat, Mohammed, Messirdi, Bekkai (2011)
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2010 Mathematics Subject Classification: 47A10. We show that the symmetric difference between the generalized Kato spectrum and the essential spectrum defined in [7] by sec(T) = {l О C ; R(lI-T) is not closed } is at most countable and we also give some relationship between this spectrum and the SVEP theory.