Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the optimal calculation of the pair correlation function for an
  orthorombic system   We present a new computational method to calculate arbitrary pair correlation
functions of an orthorombic system in the most efficient way. The algorithm is
demonstrated by the calculation of the radial distribution function of shock
compressed liquid hydrogen.

2
The categories of this paper are: math
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
7
The categories of this paper are: hep-th
4
The categories of this paper are: cond-mat
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
18
The categories of this paper are: econ
21
The categories of this paper are: adap-org
23
The categories of this paper are: solv-int