Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Mimicking Dark Matter   I show that a very simple model in the context of Newtonian physics promoted
to a first approximation of general relativity can mimic Dark matter and
explain most of its intriguing properties. Namely: i) Dark matter is a halo
associated to ordinary matter; ii) Dark matter does not interact with ordinary
matter nor with itself; iii) Its influence grows with the size of the aggregate
of ordinary matter that is considered, and iv) Dark matter influences the
propagation of light.

24
The categories of this paper are: dg-ga
33
The categories of this paper are: plasm-ph
25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
4
The categories of this paper are: cond-mat
26
The categories of this paper are: bayes-an
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
14
The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci
19
The categories of this paper are: eess
30
The categories of this paper are: q-alg