Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Classification of U_q(sl_2)-module algebra structures on the quantum
  plane   A complete list of Uq(sl2)-module algebra structures on the quantum plane is
produced and the (uncountable family of) isomorphism classes of these
structures are described. The composition series of representations in question
are computed. The classical limits of the Uq(sl2)-module algebra structures are
discussed.

21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
28
The categories of this paper are: alg-geom
4
The categories of this paper are: cond-mat
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
9
The categories of this paper are: nlin
18
The categories of this paper are: econ
19
The categories of this paper are: eess
10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an