Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Sine-Gordon theory in a semi-strip   Initial-boundary value problems for complex sine-Gordon and sine-Gordon
equations in a semi--strip are treated. The evolution of the Weyl function and
a uniqueness result are obtained for complex sine-Gordon equation. The
evolution of the Weyl function as well as an existence result and a procedure
to recover solution are given for sine-Gordon equation. It is shown that for a
wide class of examples the solutions of the sine-Gordon equation are unbounded
in the quarter-plane.

20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
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The categories of this paper are: q-fin
22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
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The categories of this paper are: patt-sol
37
The categories of this paper are: supr-con
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The categories of this paper are: nucl-ex
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph
26
The categories of this paper are: bayes-an