Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Singularities of a characteristic Cauchy problem for a PDE with singular
  coefficients   In this paper we give an explicit representation of the solutions of a
characteristic Cauchy problem for a class of PDEs with singular coefficients.
We give the explicit solutions in terms of the Gauss hypergeometric functions,
which enable us to study the singularities and the analytic continuation. Our
results are illustrated through some examples.

6
The categories of this paper are: astro-ph
21
The categories of this paper are: adap-org
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
35
The categories of this paper are: mtrl-th
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The categories of this paper are: cond-mat
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The categories of this paper are: gr-qc
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The categories of this paper are: q-fin
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The categories of this paper are: chao-dyn
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The categories of this paper are: acc-phys
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The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph
13
The categories of this paper are: quant-ph