Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Sharp pointwise gradient estimates for Riesz potentials with a bounded
  density   We establish sharp inequalities for the Riesz potential and its gradient in
$\mathbb{R}^{n}$ and indicate their usefulness for potential analysis, moment
theory and other applications.

31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
6
The categories of this paper are: astro-ph
33
The categories of this paper are: plasm-ph
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
14
The categories of this paper are: math-ph
13
The categories of this paper are: quant-ph
0
The categories of this paper are: hep-ph
21
The categories of this paper are: adap-org