### 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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Sokolov, Maksim (2005)

Electronic Journal of Differential Equations (EJDE) [electronic only]

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M. T. Karaev (2006)

Colloquium Mathematicae

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El Houda Mahmoud, Nour, Yaïch, Imen (2006)

Electronic Journal of Differential Equations (EJDE) [electronic only]

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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.

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.

Sakata, Mayumi (2007)

Electronic Journal of Differential Equations (EJDE) [electronic only]

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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).

Marta Kováříková (1967)

Czechoslovak Mathematical Journal

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Strauss, Vladimir (2008)

Abstract and Applied Analysis

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Che-Kao Fong (1979)

Studia Mathematica

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Lavon Page (1982)

Banach Center Publications

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