On one extremal problem for positive series

• Дата: 2005
• Автори: Stepanets, O. I., Shydlich, A. L., Степанець, О. І., Шидліч, А. Л.
• Формат: Стаття
• Мова: Українська; Англійська
• Опубліковано: Institute of Mathematics, NAS of Ukraine 2005
• Онлайн доступ: https://umj.imath.kiev.ua/index.php/umj/article/view/3718
• Назва журналу: Ukrains’kyi Matematychnyi Zhurnal

The approximation properties of the spaces $S^p_{\varphi}$ introduced by Stepanets’ were studied in a series of works of Stepanets’ and his disciples. In these works, problems related to the determination of exact values of $n$-term approximations of $q$-ellipsoids in these spaces were reduced to so...