Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Asymptotic energy distribution of one-dimensional nonlinear wave
  equation   In this work we consider the defocusing nonlinear wave equation in
one-dimensional space. We show that almost all energy is located near the light
cone $|x|=|t|$ as time tends to infinity. We also prove that any light cone
will eventually contain some energy. As an application we obtain a result about
the asymptotic behaviour of solutions to focusing one-dimensional wave equation
with compact-supported initial data.

21
The categories of this paper are: adap-org
14
The categories of this paper are: math-ph
17
The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
6
The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
19
The categories of this paper are: eess
37
The categories of this paper are: supr-con