НЕКОТОРЫЕ ЭКСТРЕМАЛЬНЫЕ ЗАДАЧИ ГАРМОНИЧЕСКОГО АНАЛИЗА И ТЕОРИИ ПРИБЛИЖЕНИЙ
НЕКОТОРЫЕ ЭКСТРЕМАЛЬНЫЕ ЗАДАЧИ ГАРМОНИЧЕСКОГО АНАЛИЗА И ТЕОРИИ ПРИБЛИЖЕНИЙ
The paper is devoted to a survey of the main results obtained in the solution of the Tura´n and Fejer extremal problems on the torus; the Tur´an, Delsarte, Bohmann, and Logan extremal problems on the Euclidean space, half-line, and hyperboloid. We also give results obtained when solving a similar problem …