Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Numerical Solutions to the Sine-Gordon Equation   The sine-Gordon equation is a nonlinear partial differential equation. It is
known that the sine-Gordon has soliton solutions in the 1D and 2D cases, but
such solutions are not known to exist in the 3D case. Several numerical
solutions to the 1D, 2D, and 3D sine-Gordon equation are presented and comments
are given on the nature of the solutions.

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The categories of this paper are: astro-ph
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The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
0
The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int
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The categories of this paper are: hep-ex
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The categories of this paper are: nucl-th
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The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
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The categories of this paper are: hep-lat
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol
37
The categories of this paper are: supr-con