Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Parafermionic Representation of the Affine $sl(2/1)$ Algebra at
  Fractional Level   The four fermionic currents of the affine superalgebra $sl(2/1)$ at
fractional level $k=1/u-1$, u positive integer, are shown to be realised in
terms of a free scalar field, an $sl(2)$ doublet field and a primary field of
the parafermionic algebra $Z_{u-1}$.

8
The categories of this paper are: hep-ex
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
6
The categories of this paper are: astro-ph
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
32
The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
36
The categories of this paper are: cmp-lg