Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Variable stepsize commutator free Lie group integrators   We introduce variable stepsize commutator free Lie group integrators, where
the error control is achieved using embedded Runge-Kutta pairs.

19
The categories of this paper are: eess
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int
20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
33
The categories of this paper are: plasm-ph
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
21
The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc