Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A note on Vilenkin-Fej\'er means on the Martingale Hardy spaces $H_{p}$   The main aim of this note is to derive necessary and sufficient conditions
for the convergence of Fej\'er means in terms of the modulus of continuity of
the Hardy spaces $H_{p},$ $\left(0<p\leq 1\right)$.

8
The categories of this paper are: hep-ex
24
The categories of this paper are: dg-ga
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
5
The categories of this paper are: gr-qc
30
The categories of this paper are: q-alg
16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an
3
The categories of this paper are: physics
28
The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph