Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New Estimations for Sturm-Liouville Problems in Difference Equations   In this paper, Sturm-Liouville problem for difference equations is considered
with potential function q(n). The representations of solutions are obtained by
variation of parameters method. These solutions are proved, using summation by
parts. Also, estimation of asymptotic expansion of the solutions are
established.

13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
21
The categories of this paper are: adap-org
36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
4
The categories of this paper are: cond-mat
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
1
The categories of this paper are: cs