Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Four twisted differential operators for the N=4 superconformal algebra   The N=4, d=4 Yang-Mills conformal supersymmetry exhibits a very simple
sub-sector described by four differential operators. The invariance under this
subalgebra is big enough to determine the N=4 theory. Some attempts are done to
interpret these differential operators.

31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
8
The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an