Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Computing General Relativistic effects from Newtonian N-body
  simulations: Frame dragging in the post-Friedmann approach   We present the first calculation of an intrinsically relativistic quantity in
fully non-linear cosmolog- ical large-scale structure studies. Traditionally,
non-linear structure formation in standard {\Lambda}CDM cosmology is studied
using N-body simulations, based on Newtonian gravitational dynamics on an
expanding background. When one derives the Newtonian regime in a way that is a
consistent ap- proximation to the Einstein equations, a gravito-magnetic vector
potential - giving rise to frame dragging - is present in the metric in
addition to the usual Newtonian scalar potential. At leading order, this vector
potential does not affect the matter dynamics, thus it can be computed from
Newtonian N-body simulations. We explain how we compute the vector potential
from simulations in {\Lambda}CDM and examine its magnitude relative to the
scalar potential. We also discuss some possible observable effects.

18
The categories of this paper are: econ
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
21
The categories of this paper are: adap-org
2
The categories of this paper are: math
28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
4
The categories of this paper are: cond-mat
23
The categories of this paper are: solv-int
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The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics