ACTA issues

Convergence of subsequences of partial sums and logarithmic means of Walsh--Fourier series

U. Goginava, G. Tkebuchava

Acta Sci. Math. (Szeged) 72:1-2(2006), 159-177
5916/2009

Abstract. In this paper we discuss some convergence and divergence properties of subsequences of partial sums and logarithmic means of Walsh--Fourier series of functions in the uniform, and in the $L$ Lebesgue norm. We give necessary and sufficient conditions for the convergence regarding the modulus of continuity of the function. It is also proved that there exists a bounded function for which the logarithmic means converge and the partial sums diverge.


AMS Subject Classification (1991): 42C10

Keyword(s): Walsh--Fourier series, Norm convergence, Logarithmic means


Received January 17, 2005, and in revised form April 6, 2005. (Registered under 5916/2009.)