Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Topological Charged Black Holes in High Dimensional Spacetimes and Their
  Formation from Gravitational Collapse of a Type II Fluid   Topological charged black holes coupled with a cosmological constant in
$R^{2}\times X^{D-2}$ spacetimes are studied, where $X^{D-2}$ is an Einstein
space of the form ${}^{(D-2)}R_{AB} = k(D-3) h_{AB}$. The global structure for
the four-dimensional spacetimes with $k = 0$ is investigated systematically.
The most general solutions that represent a Type $II$ fluid in such a high
dimensional spacetime are found, and showed that topological charged black
holes can be formed from the gravitational collapse of such a fluid. When the
spacetime is (asymptotically) self-similar, the collapse always forms black
holes for $k = 0, -1$, in contrast to the case $k = 1$, where it can form
either balck holes or naked singularities.

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The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph
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The categories of this paper are: nucl-ex
10
The categories of this paper are: q-bio
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The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
29
The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph
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The categories of this paper are: eess
3
The categories of this paper are: physics
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The categories of this paper are: solv-int
4
The categories of this paper are: cond-mat