Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Low-dimensional modelling of a generalized Burgers equation   Burgers equation is one of the simplest nonlinear partial differential
equations-it combines the basic processes of diffusion and nonlinear
steepening. In some applications it is appropriate for the diffusion
coefficient to be a time-dependent function. Using a Wayne's transformation and
centre manifold theory, we derive l-mode and 2-mode centre manifold models of
the generalised Burgers equations for bounded smooth time dependent
coefficients. These modellings give some interesting extensions to existing
results such as the similarity solutions using the similarity method.

4
The categories of this paper are: cond-mat
15
The categories of this paper are: nucl-ex
21
The categories of this paper are: adap-org
18
The categories of this paper are: econ
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
9
The categories of this paper are: nlin