Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A new parton shower algorithm: Shower evolution, matching at leading and
  next-to-leading order level   In this paper we outline a new parton shower algorithm based on the
Catani-Seymour dipole factorization. Our motivation is to have an algorithm
which can naturally cooperate with the NLO calculations.

28
The categories of this paper are: alg-geom
2
The categories of this paper are: math
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
18
The categories of this paper are: econ
3
The categories of this paper are: physics
24
The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
11
The categories of this paper are: hep-lat
9
The categories of this paper are: nlin
6
The categories of this paper are: astro-ph
19
The categories of this paper are: eess
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int