Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Non-homogeneity-driven Universe acceleration   Class of spherically symmetric Stephani cosmological models is examined in
the context of evolution type. It is assumed that the equation of state at the
symmetry center of the models is barotropic. Classification of cosmological
models is performed depending on different values and signs of two free
parameters. It is shown that for (hyperbolic geometry) dust-like cosmological
model exhibits accelerated expansion at later stages of evolution. The Hubble
and deceleration parameters are defined in the model and it is shown that the
deceleration parameter decreases with the distance becoming negative for
sufficiently distant galaxies. Redshift-magnitude relation is calculated and
discussed in the context of SnIa observational data. It is noticed that the
most distant supernovae of type Ia fit quite well to the redshift-magnitude
relation calculated in the considered model without introducing the
cosmological constant. It is also shown that the age of the universe in the
model is longer than in the Friedmann model corresponding to the same Hubble
and energy density parameters.

27
The categories of this paper are: comp-gas
15
The categories of this paper are: nucl-ex
21
The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat