Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Singular quasilinear elliptic systems involving gradient terms   In this paper we establish existence of smooth positive solutions for a
singular quasilinear elliptic system involving gradient terms. The approach
combines sub-supersolutions method and Schauder's fixed point theorem.

5
The categories of this paper are: gr-qc
6
The categories of this paper are: astro-ph
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
3
The categories of this paper are: physics
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
1
The categories of this paper are: cs
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th
24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin