Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Existence of Some Positive Solutions to Fractional Difference Equation   The main objective of this paper is to study the existence of solutions to
some basic fractional difference equations. The tools employed are
Krasnosel'skii fixed point theorem which guarantee at least two positive
solutions.

13
The categories of this paper are: quant-ph
27
The categories of this paper are: comp-gas
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph