

Seminar on Complex Analysis (Gonchar Seminar)
March 25, 2013 18:00, Moscow, Steklov Mathematical Institute, Room 411 (8 Gubkina)






Spectral phase transitions for Jacobi matrices and asymptotic properties of orthogonal polynomials. Some examples
S. Simonov^{} ^{} Dublin Institute of Technology

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Abstract:
The talk is devoted to phenomena of spectral phase transitions for families of Jacobi matrices. Relations between spectral properties of Jacobi matrices and asymptotic properties of corresponding orthonormal polynomials will be discussed, and several examples will be given. In particular, we will consider the discrete Schroedinger operator with Wignervon Neumann potential and formulate a recent result about the asymptotics of its spectral density which was obtained by analyzing the behavior of orthonormal polynomials.

