Projection-spectra
Alexandroff, P., Ponomarev, V.
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Displaying similar documents to “Direct limits of Hausdorff spaces”
Projection-spectra
Qualitative properties of the peripheral spectrum
Jaroslav Zemánek (2007)
Banach Center Publications
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The joint approximate spectrum of a finite system of elements of a C*-algebra
GH. Mocanu (1974)
Studia Mathematica
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On the generalized Kato spectrum
Benharrat, Mohammed, Messirdi, Bekkai (2011)
Serdica Mathematical Journal
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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.