Abstract
In this paper, we find a necessary and sufficient condition for the modulus of continuity for which subsequences of Fejér means with respect to Vilenkin systems are bounded from the Hardy space
H
p
{H_{p}}
to the Lebesgue space
L
p
{L_{p}}
for all
0
<
p
<
1
2
{0<p<\frac{1}{2}}
.
AbstractThe main aim of this paper is to find necessary and sufficient conditions for the convergence of Fejér means in terms of the modulus of continuity on the Hardy spaces
In this paper we prove that the maximal operator of the Marcinkiewicz-Fejér means of the 2-dimensional Vilenkin-Fourier series is not bounded from the Hardy space
H2/3
(
G2
) to the space
L2/3
(
G2
).