Best approximation by “angles” of analytic in the unit bidisk functions

• Date: 2015
• Author Affiliations: — Днепропетровский университет имени Альфреда Нобеля; — Днепропетровский национальный университет имени Олеся Гончара
• Keywords: keywords
• Main Authors: Vakarchuk, S. B., Vakarchuk, M. B., Вакарчук, С. Б., Вакарчук, М. Б.
• Format: Article
• Language: Russian
• Published: Інститут математики НАН України 2015
• Online Access: https://trim.imath.kiev.ua/index.php/trim/article/view/283
• Journal Title: Transactions of Institute of Mathematics of NAS of Ukraine

Exact in some sense inequalities of the best approximation by ''angles'' $ $, have been obtained for the classes $\mathfrak{B}^{r_1,r_2}_2 (U^2), r_1, r_2 \in \mathbb{N}$, of two complex variables functions analytic in the unit bicircle $U^2$. These results are th...