Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Self-Similar Solutions of the Non-Strictly Hyperbolic Whitham Equations
  for the KdV Hierarchy   We study the Whitham equations for all the higher order KdV equations. The
Whitham equations are neither strictly hyperbolic nor genuinely nonlinear. We
are interested in the solution of the Whitham equations when the initial values
are given by a step function.

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The categories of this paper are: q-fin
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The categories of this paper are: hep-th
3
The categories of this paper are: physics
33
The categories of this paper are: plasm-ph
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The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
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The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
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The categories of this paper are: astro-ph
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The categories of this paper are: eess
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The categories of this paper are: ao-sci
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The categories of this paper are: funct-an
14
The categories of this paper are: math-ph