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  • 1 Московский Государственный Строительный Университет Кафедра Высшей Математики Ярославское Шоссе 26 129 337 Москва Россия
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An analog of the trace formula for orthogonal polynomials with asymptotically 2-periodic recurrence coefficients is given. This result is based on the representation of the Fej�r kernel for the system.