Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Study of a fifth order PDE using symmetries   We study a family of PDEs, which was derived as an approximation of an
extended Lotka-Volterra system, from the point of view of symmetries. Also, by
performing the self adjoint classification on that family we offer special
cases possessing non trivial conservation laws. Using both classifications we
justify the particular cases studied in the literature, and we give additional
cases that may be of importance.

25
The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
32
The categories of this paper are: atom-ph
21
The categories of this paper are: adap-org
3
The categories of this paper are: physics
4
The categories of this paper are: cond-mat
8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
14
The categories of this paper are: math-ph