Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Global existence of solutions for the relativistic Boltzmann equation on
  the flat Robertson-Walker space-time for arbitrarily large intial data   We prove a global result in time for the initial value problem for the
relativistic Boltzmann equation on the flat Robertson-Walker sapace time, in
the functional framework appropriate to the coupling with Einstein's equations.
We had nowhere to restrict the size of the initial data which can hence be
taken arbitrarily large.

13
The categories of this paper are: quant-ph
4
The categories of this paper are: cond-mat
9
The categories of this paper are: nlin
24
The categories of this paper are: dg-ga
21
The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
27
The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph