http://dspace.nbuv.gov.ua:80/handle/123456789/106456 2026-04-05T19:15:55Z http://dspace.nbuv.gov.ua:80/handle/123456789/106517 Памяти Александра Яковлевича Повзнера В ночь на 22 апреля 2008 года в США, в пригороде Вашингтона, на 93 году жизни скончался выдающийся математик и замечательный человек Александр Яковлевич Повзнер. 2008-01-01T00:00:00Z http://dspace.nbuv.gov.ua:80/handle/123456789/106516 Functional Model of Commutative Operator Systems Zolotarev, V.A. A functional model for a commutative system of the linear bounded operators {T₁, T₂}, when T₁ is a contraction, is built. 2008-01-01T00:00:00Z http://dspace.nbuv.gov.ua:80/handle/123456789/106515 Orthogonal Polynomials on Rays: Properties of Zeros, Related Moment Problems and Symmetries Zagorodnyuk, S.M. We establish some basic properties of zeros for orthonormal polynomials on radial rays. We introduce a moment problem related to these orthonormal polynomials and obtain necessary and sufficient conditions for its solvability. We establish some properties of orthonormal polynomials in the case when the measure of orthogonality has symmetries and show that the moment problem has solutions with some symmetric properties. 2008-01-01T00:00:00Z http://dspace.nbuv.gov.ua:80/handle/123456789/106514 On Subharmonic Functions of the First Order with Restrictions on the Real Axis Poedintseva, I.V. 2008-01-01T00:00:00Z