Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hidden $sl_2$-algebra of finite-difference equations   The connection between polynomial solutions of finite-difference equations
and finite-dimensional representations of the $sl_2$-algebra is established
(the talk given at the Wigner Symposium, Guadalajara, Mexico, August 1995, to
be published in the Proceedings)

1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
19
The categories of this paper are: eess
4
The categories of this paper are: cond-mat
6
The categories of this paper are: astro-ph
21
The categories of this paper are: adap-org
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg