Jan Janas, Sergey Simonov
Weyl-Titchmarsh type formula for discrete Schroedinger operator with Wigner-von Neumann potential
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ABSTRACT.  We consider discrete Schroedinger operator J with Wigner-von Neumann potential not belonging to l^2. We find asymptotics of orthonormal polynomials associated to J. We prove the Weyl-Titchmarsh type formula, which relates the spectral density of J to a coefficient in asymptotics of orthonormal polynomials.