Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Sharp well--posedness for the generalized KdV of order three on the half
  line   In this paper we study the generalized Korteweg de Vries (KdV) equation with
the nonlinear term of order three: $(u^{3+1})_x$. We prove sharp local
well--posedness for the initial and boundary value problem posed on the right
half line. We thus close the gap in the well--posedness theory of the
generalized KdV which remained open after the seminal work of Colliander and
Kenig in \cite{CK}.

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The categories of this paper are: acc-phys
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The categories of this paper are: bayes-an
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The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat
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The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol
5
The categories of this paper are: gr-qc
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: cmp-lg
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The categories of this paper are: supr-con
1
The categories of this paper are: cs
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The categories of this paper are: adap-org
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The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph