Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spherical `Top-Hat' Collapse in general Chaplygin gas dominated
  universes   We expand previous works on the spherical `top-hat' collapse (SC-TH)
framework in generalized Chaplygin gas (gCg) dominated universes. Here we allow
the collapse in all energetic components within the system. We analyze the
non-linear stages of collapse for various choices of parameter \alpha of the
gCg model introducing an exact formulation for the so-called effective sound
speed, $c_{eff}^2$. We show that, within the SC-TH framework, the growth of the
structure becomes faster with increasing values of \alpha.

28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
4
The categories of this paper are: cond-mat
1
The categories of this paper are: cs
19
The categories of this paper are: eess
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
8
The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
15
The categories of this paper are: nucl-ex