Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Loss of Regularity in the $K(m,n)$ Equations   Using a priori estimates we prove that initially nonnegative, smooth and
compactly supported solutions of the $K(m,n)$ equations must lose their
smoothness in finite time.
  Formation of a singularity is a prerequisite for the emergence of compactons.

25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc
32
The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
19
The categories of this paper are: eess
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs