Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Introduction to the Differential Algebra Normal Form Algorithm using the
  Centrifugal Governor as an Example   This paper provides a detailed introduction into the differential algebra
(DA) based normal form algorithm using the example of the symplectic one
dimensional system of the centrifugal governor. The intention of this paper is
to make the single steps of the algorithm as transparent as possible in the
hope that the understanding and use of DA normal form methods will spread
throughout the scientific community.

32
The categories of this paper are: atom-ph
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
8
The categories of this paper are: hep-ex
17
The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph