Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Collapsing Inhomogeneous Dust Fluid in the Background of Dark Energy   In the present work, gravitational collapse of an inhomogeneous spherical
star model, consisting of inhomogeneous dust fluid (dark matter) in the
background of dark energy is considered. The collapsing process is examined
first separately for both dark matter and dark energy and then under the
combined effect of dark matter and dark energy with or without interaction. The
dark energy is considered in the form of perfect fluid and both marginally and
non-marginally bound cases are considered for the collapsing model. Finally
dark energy in the form of anisotropic fluid is investigated and it is found to
be similar to ref. [12]

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The categories of this paper are: dg-ga
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The categories of this paper are: q-fin
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The categories of this paper are: eess
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
2
The categories of this paper are: math
34
The categories of this paper are: chem-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: cmp-lg
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-ex
4
The categories of this paper are: cond-mat
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The categories of this paper are: nucl-ex
18
The categories of this paper are: econ