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NANOSYSTEMS: PHYSICS, CHEMISTRY, MATHEMATICS, 2012, 3 (6), P. 16–24

ON INFINITE NUMBER OF NEGATIVE EIGENVALUES OF THE FRIEDRICHS MODEL

Yu.Kh. Eshkabilov – National University of Uzbekistan named after Mirzo Ulugbek, Tashkent, Uzbekistan, mechanical-mathematical faculty, Doctor of sciences in physics and mathematics, professor, yusup62@mail.ru

The discrete spectrum of a self-adjoint operator in the framework of the Friedrichs model with a positive symmetrical kernel is studied in this paper. Sufficient conditions for the existence of infinite number of negative eigenvalues in the framework of the Friedrichs model are described.

Keywords: Friedrichs model, spectra, essential spectrum, discrete spectrum.

UDC 517.984.53

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