On exact values of quasiwidths of some classes of functions

• Datum: 1996
• Hauptverfasser: Vakarchuk, S. B., Shabozov, M. Sh., Вакарчук, С. Б., Шабозов, М. Ш.
• Format: Artikel
• Sprache: Russisch; Englisch
• Veröffentlicht: Institute of Mathematics, NAS of Ukraine 1996
• Online Zugang: https://umj.imath.kiev.ua/index.php/umj/article/view/5327
• Назва журналу: Ukrains’kyi Matematychnyi Zhurnal

In the Hilbert space L 2(Δ2), Δ = [0, 2 π] we establish exact estimates of the Kolmogorov quasiwidths of some classes of periodic functions of two variables whose averaged modules of smoothness of mixed derivatives are majorizable by given functions.