On the geometric properties of the joint spectrum of a family of self-adjoint operators
Yu. Abramov (1977)
Studia Mathematica
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Yu. Abramov (1977)
Studia Mathematica
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V. Rakočević (1985)
Matematički Vesnik
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Volker Wróbel (1986)
Studia Mathematica
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I. Marek (1976)
Acta Universitatis Carolinae. Mathematica et Physica
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Al-Nayef, Anwar A. (2001)
Journal of Applied Mathematics and Stochastic Analysis
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Appell, Jürgen
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We give a survey on spectra for various classes of nonlinear operators, with a particular emphasis on a comparison of their advantages and drawbacks. Here the most useful spectra are the asymptotic spectrum by M. Furi, M. Martelli and A. Vignoli (1978), the global spectrum by W. Feng (1997), and the local spectrum (called “phantom”) by P. Santucci and M. Väth (2000). In the last part we discuss these spectra for homogeneous operators (of any degree), and derive a discreteness result...
Catană, Petronela (2005)
Analele Ştiinţifice ale Universităţii “Ovidius" Constanţa. Seria: Matematică
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