Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Some Exact Results for Two-Loop Diagrams with Three and Four External
  Lines   Evaluation of three- and four-point diagrams with massless internal particles
and arbitrary external momenta is considered. Exact results for some two-loop
diagrams (planar and non-planar three-point contributions and the "double box"
diagram) are obtained in terms of polylogarithms.

27
The categories of this paper are: comp-gas
2
The categories of this paper are: math
17
The categories of this paper are: q-fin
24
The categories of this paper are: dg-ga
18
The categories of this paper are: econ
34
The categories of this paper are: chem-ph
4
The categories of this paper are: cond-mat
9
The categories of this paper are: nlin
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
11
The categories of this paper are: hep-lat
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The categories of this paper are: stat
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The categories of this paper are: eess
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The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
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The categories of this paper are: alg-geom