Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Noncommutative harmonic analysis on semigroups   In this paper we obtain some noncommutative multiplier theorems and maximal
inequalities on semigroups. As applications, we obtain the corresponding
individual ergodic theorems. Our main results extend some classical results of
Stein and Cowling on one hand, and simplify the main arguments of Junge-Le
Merdy-Xu's related work [15].

19
The categories of this paper are: eess
1
The categories of this paper are: cs
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
30
The categories of this paper are: q-alg
29
The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph
37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org
9
The categories of this paper are: nlin
3
The categories of this paper are: physics
14
The categories of this paper are: math-ph