Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Towards the KPP-Problem and log t-Front shift for Higher-Order Nonlinear
  PDEs II. Quasilinear Bi- and Tri-Harmonic Equations   It is shows that some aspects of classic KPP-problem (1937) can be extended
to some fourth and sixth-order quasilinear parabolic equations.

37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat
23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics
15
The categories of this paper are: nucl-ex
0
The categories of this paper are: hep-ph
6
The categories of this paper are: astro-ph
7
The categories of this paper are: hep-th