Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Eigenfunctions for singular fully non linear equations in unbounded
  domains   In this paper we prove some Harnack inequality for fully non linear
degenerate elliptic equations, in the two dimensional case, extending the
results of Davila Felmer and Quaas in the singular case but in all dimensions.
We then apply this result for the existence of an eigenfunction in smooth
bounded domain.

14
The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
18
The categories of this paper are: econ
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
4
The categories of this paper are: cond-mat
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg