Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Identification of All Dark Matter as Black Holes   For the universe I use dimensionless entropy $S/k = \ln \Omega$ for which the
most convenient unit is the googol ($10^{100}$) and identify all dark matter as
black holes whereupon the present entropy is about a thousand googols. While
the energy of the universe has been established to be about 0.04 baryons, 0.24
dark matter and 0.72 dark energy, the cosmological entropy is almost entirely,
about $(1 - 10^{-15})$, from black holes and only $10^{-15}$ from everything
else. This identification of all dark matter as black holes is natural in
statistical mechanics.

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The categories of this paper are: eess
33
The categories of this paper are: plasm-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
4
The categories of this paper are: cond-mat
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
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The categories of this paper are: bayes-an
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The categories of this paper are: funct-an
9
The categories of this paper are: nlin
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The categories of this paper are: stat
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The categories of this paper are: comp-gas
2
The categories of this paper are: math
3
The categories of this paper are: physics