Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the existence of global solutions for $T^{3}$-Gowdy spacetimes with
  stringy matter   We show a global existence theorem for Einstein-matter equations of
$T^{3}$-Gowdy symmetric spacetimes with stringy matter. The areal time
coordinate is used. It is shown that this spacetime has a crushing singularity
into the past. From these results we can show that the spacetime is foliated by
compact hypersurfaces of constant mean curvature.

25
The categories of this paper are: patt-sol
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
6
The categories of this paper are: astro-ph
13
The categories of this paper are: quant-ph
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
3
The categories of this paper are: physics
4
The categories of this paper are: cond-mat
7
The categories of this paper are: hep-th
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
17
The categories of this paper are: q-fin
1
The categories of this paper are: cs