Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Tor: a toolbox for the continuation of two-dimensional tori in
  autonomous systems and non-autonomous systems with periodic forcing   We present a toolbox for the continuation of two-dimensional tori in
autonomous dynamical systems and non-autonomous systems with periodic forcing.
A torus is solved as the solution to a boundary-value problem. Truncated
Fourier series and collocation methods are used to discretize the
boundary-value problem. This toolbox is based on the continuation package COCO
(https://sourceforge.net/projects/cocotools/). A few examples are included to
demonstrate the functionality of this toolbox.

20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
18
The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
8
The categories of this paper are: hep-ex
17
The categories of this paper are: q-fin