Determination of jumps in terms of linear operators

• Published in: Український математичний журнал
• Date: 2015
• Main Author: Zviadadze, Sh.
• Format: Article
• Language: English
• Published: Інститут математики НАН України 2015
• Subjects: Статті
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/165922
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Determination of jumps in terms of linear operators / Sh. Zviadadze // Український математичний журнал. — 2015. — Т. 67, № 12. — С. 1649–1657. — Бібліогр.: 21 назв. — англ.

A theorem of Luk´acs [4] states that the partial sums of conjugate Fourier series of a periodic Lebesgue integrable function f diverge with a logarithmic rate at the points of discontinuity of f of the first kind. M´oricz [5] proved a similar theorem for the rectangular partial sums of double variab...