Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Evolving Horava Cosmological Horizons   Several sets of radially propagating null congruence generators are exploited
in order to form 3-dimensional marginally trapped surfaces, referred to as
black hole and cosmological apparent horizons in a Horava universe. Based on
this method, we deal with the characteristics of the 2-dimensional space-like
spheres of symmetry and the peculiarities of having trapping horizons.
Moreover, we apply this method in standard expanding and contracting FLRW
cosmological models of a Horava universe to investigate the conditions under
which the extra parameters of the theory may lead to trapped/anti-trapped
surfaces both in the future and in the past. We also include the cases of
negative time, referred to as the finite past, and discuss the formation of
anti-trapped surfaces inside the cosmological apparent horizons.

27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
6
The categories of this paper are: astro-ph
26
The categories of this paper are: bayes-an
37
The categories of this paper are: supr-con
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an