Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A reformulation of an ordinary differential equation   The purpose of this note is to present a formulation of a given nonlinear
ordinary differential equation into an equivalent system of linear ordinary
differential equations. It is evident that the easiness of a such procedure
would be able to open a new way in order to calculate or approximate the
solution of an ordinary differential equation. Some examples are presented.

33
The categories of this paper are: plasm-ph
16
The categories of this paper are: stat
27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
36
The categories of this paper are: cmp-lg
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
24
The categories of this paper are: dg-ga
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio