On one extremal problem for positive series

• Datum: 2005
• Hauptverfasser: Stepanets, O. I., Shydlich, A. L., Степанець, О. І., Шидліч, А. Л.
• Format: Artikel
• Sprache: Ukrainisch; Englisch
• Veröffentlicht: Institute of Mathematics, NAS of Ukraine 2005
• Online Zugang: 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...