Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: PHEGAS: a phase-space generator for automatic cross-section computation   A phase-space generation algorithm, capable to efficiently integrate the
squared amplitude of any scattering process, is presented. The algorithm has
been implemented in a Monte Carlo program, PHEGAS, which, using HELAC, a
helicity amplitude computational package,can be used for automatic
cross-section computation and event generation. Results for several scattering
processes with four, five and six particles in the final state are briefly
presented.

35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
16
The categories of this paper are: stat
27
The categories of this paper are: comp-gas
3
The categories of this paper are: physics
9
The categories of this paper are: nlin
19
The categories of this paper are: eess
4
The categories of this paper are: cond-mat