The division method for subspectra of self-adjoint differential vector-operators.
Sokolov, Maksim (2005)
Electronic Journal of Differential Equations (EJDE) [electronic only]
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Displaying similar documents to “An abstract approach to some spectral problems of direct sum differential operators.”
The division method for subspectra of self-adjoint differential vector-operators.
Corrigendum to "On the spectral multiplicity of a direct sum of operators" (Colloq. Math. 104 (2006), 105-112)
M. T. Karaev (2006)
Colloquium Mathematicae
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Inverse spectral analysis for singular differential operators with matrix coefficients.
El Houda Mahmoud, Nour, Yaïch, Imen (2006)
Electronic Journal of Differential Equations (EJDE) [electronic only]
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On unbounded hyponormal operators III
J. Janas (1994)
Studia Mathematica
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The paper deals mostly with spectral properties of unbounded hyponormal operators. Some nontrivial examples of such operators are given.
The Positive Supercyclicity Theorem.
F. León Saavedra (2004)
Extracta Mathematicae
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We present some recent results related with supercyclic operators, also some of its consequences. We will finalize with new related questions.
Convergence of generalized eigenfunction expansions.
Sakata, Mayumi (2007)
Electronic Journal of Differential Equations (EJDE) [electronic only]
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On the spectral properties of translation operators in one-dimensional tubes
Wojciech Hyb (1991)
Annales Polonici Mathematici
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We study the spectral properties of some group of unitary operators in the Hilbert space of square Lebesgue integrable holomorphic functions on a one-dimensional tube (see formula (1)). Applying the Genchev transform ([2], [5]) we prove that this group has continuous simple spectrum (Theorem 4) and that the projection-valued measure for this group has a very explicit form (Theorem 5).
On the polar decomposition of scalar-type operators
Marta Kováříková (1967)
Czechoslovak Mathematical Journal
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Models of function type for commutative symmetric operator families in Krein spaces.
Strauss, Vladimir (2008)
Abstract and Applied Analysis
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On M-hyponormal operators
Che-Kao Fong (1979)
Studia Mathematica
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