Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A one-dimensional symmetry result for solutions of an integral equation
  of convolution type   We consider an integral equation in the plane, in which the leading operator
is of convolution type, and we prove that monotone (or stable) solutions are
necessarily one-dimensional.

26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an
14
The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
30
The categories of this paper are: q-alg
3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci