Summability of multiple trigonometric Fourier series by linear methods

Author: Leri Gogoladze
Keywords: best approximation, quasi-polynomials, modulus of continuity
Annotation:

The paper deals with the problem of estimation of deviation of functions of several variables from linear means of their multiple trigonometric Fourier series.An approach of reducing this problem to the corresponding problem for functions of a single variable is developed.

Lecture files:

Summability of multiple trigonometric Fourier series by linear methods [en]
ფურიეს ჯერადი ტრიგონომეტრიული მწკრივების წრფივი მეთოდებით შეჯამებადობის შესახებ [ka]