Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Halo Models of Large Scale Structure and Reliability of Cosmological
  N-Body Simulations   Halo models of the large scale structure of the Universe are critically
examined, focusing on the definition of halos as smooth distributions of cold
dark matter. This definition is essentially based on the results of
cosmological N-body simulations. By a careful analysis of the standard
assumptions of halo models and N-body simulations and by taking into account
previous studies of self-similarity of the cosmic web structure, we conclude
that N-body cosmological simulations are not fully reliable in the range of
scales where halos appear. Therefore, to have a consistent definition of halos,
it is necessary either to define them as entities of arbitrary size with a
grainy rather than smooth structure or to define their size in terms of
small-scale baryonic physics.

2
The categories of this paper are: math
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
19
The categories of this paper are: eess
11
The categories of this paper are: hep-lat
9
The categories of this paper are: nlin
12
The categories of this paper are: nucl-th
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
21
The categories of this paper are: adap-org
4
The categories of this paper are: cond-mat
17
The categories of this paper are: q-fin
26
The categories of this paper are: bayes-an