Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The recollapse problem of closed isotropic models in second order
  gravity theory   We study the closed universe recollapse conjecture for positively curved
Friedmann-Robertson-Walker (FRW) models in the Jordan frame of the second order
gravity theory. We analyse the late time evolution of the model with the
methods of the dynamical systems. We find that an initially expanding closed
FRW universe, starting close to the Minkowski spacetime, may exhibit
oscillatory behaviour.

35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
4
The categories of this paper are: cond-mat
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
14
The categories of this paper are: math-ph
0
The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex
29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
33
The categories of this paper are: plasm-ph