Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: FLY. A parallel tree N-body code for cosmological simulations. Reference
  Guide   FLY is a parallel treecode which makes heavy use of the one-sided
communication paradigm to handle the management of the tree structure. In its
public version the code implements the equations for cosmological evolution,
and can be run for different cosmological models.
  This reference guide describes the actual implementation of the algorithms of
the public version of FLY, and suggests how to modify them to implement other
types of equations (for instance the Newtonian ones)

1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph
4
The categories of this paper are: cond-mat
8
The categories of this paper are: hep-ex
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess