Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Numerical solutions of the coupled nonlinear Klein--Gordon equations by
  trigonometric integrator pseudospectral discretization   A scheme stemming from the use of pseudospectral approximations to spatial
derivatives followed by a time integrator based on trigonometric polynomials is
proposed for the numerical solutions of the coupled nonlinear Klein--Gordon
equations. Numerical tests on one- and three-coupled Klein--Gordon equations
are presented, which are geared towards understanding the accuracy and
stability, and demonstrating the efficiency and high resolution capacity in
application.

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The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
1
The categories of this paper are: cs
4
The categories of this paper are: cond-mat
7
The categories of this paper are: hep-th
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc