Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A fast and precise method to solve the Altarelli-Parisi equations in x
  space   A numerical method to solve linear integro-differential equations is
presented. This method has been used to solve the QCD Altarelli-Parisi
evolution equations within the H1 Collaboration at DESY-Hamburg. Mathematical
aspects and numerical approximations are described. The precision of the method
is discussed.

29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
26
The categories of this paper are: bayes-an
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
6
The categories of this paper are: astro-ph
23
The categories of this paper are: solv-int
4
The categories of this paper are: cond-mat
11
The categories of this paper are: hep-lat
9
The categories of this paper are: nlin
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph