Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Instability of Multi-Solitons for Derivative Nonlinear Schr{\"o}dinger
  Equations   In [19] and [26], the authors proved the stability of multi-solitons for
derivative nonlinear Schr{\"o}dinger equations. Roughly speaking, sum of finite
stable solitons is stable. We predict that if there is one unstable solition
then multi-soliton is unstable. This prediction is proved in [7] for classical
nonlinear Schr{\"o}dinger equations. In this paper, we proved this prediction
for derivative nonlinear Schr{\"o}dinger equations by using the method of
C{\^o}te-Le Coz [7] with the help of Gauge transformation.

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The categories of this paper are: q-bio
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The categories of this paper are: ao-sci
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The categories of this paper are: nucl-ex
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The categories of this paper are: mtrl-th
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The categories of this paper are: hep-th
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The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: supr-con
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The categories of this paper are: hep-ex
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The categories of this paper are: eess
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The categories of this paper are: atom-ph
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The categories of this paper are: physics
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The categories of this paper are: quant-ph
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The categories of this paper are: adap-org
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The categories of this paper are: solv-int