Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cauchy problem with data on a characteristic cone for the
  Einstein-Vlasov equations   We show how to solve the Cauchy problem for the Einstein-Vlasov equations
with geometric initial data on a light-cone.

12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
8
The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
6
The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci