Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dispersion management in optical fiber links: Integrability in leading
  nonlinear order   We show that an integro-differential equation model for pulse propagation in
optical transmission lines with dispersion management, is integrable at the
{\it leading nonlinear order}. This equation can be transformed into the
nonlinear Schroedinger equation by a near-identity canonical transformation for
the case of weak dispersion. We also derive the next order (nonintegrable)
correction.

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The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
18
The categories of this paper are: econ
3
The categories of this paper are: physics
4
The categories of this paper are: cond-mat
21
The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th