Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A wide class of four point functions of BPS operators in N=4 SYM at
  order g^4   The calculation of a large family of four point functions of general BPS
operators in N=4 SYM is reduced to the evaluation of colour contractions. For
1/2 BPS operators O_\Delta the explicit results at order g^4 for the function <
O_n O_2 O_n O_2 > are given up to n=6. The OPE of the general result is
performed up to the second order in the short distance expansion parameter. Two
examples are given, in which the mixing of the operators in the intermediate
channel can be resolved using four point functions computed by this method.

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The categories of this paper are: alg-geom
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
11
The categories of this paper are: hep-lat
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
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The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol
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The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin