Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Role of the constant deceleration parameter in cosmological models with
  perfect fluid and dark energy   The main purpose of the present paper is to investigate LRS Bianchi type I
metric in the presence of perfect fluid and dark energy. In order to obtain a
deterministic solution of the field equations we have assumed that, the two
sources of the perfect fluid and dark energy interact minimally with separate
conservation of their energy momentum tensors. The EoS parameter of the perfect
fluid is also assumed to be constant. In addition to these we have used a
special law of variation of Hubble parameter proposed by Berman that yields
constant deceleration parameter. For two different values of the constant
deceleration parameters we have obtained two different cosmological models. The
physical behaviors of both the models have been discussed by using some
physical parameters.

19
The categories of this paper are: eess
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
23
The categories of this paper are: solv-int
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
21
The categories of this paper are: adap-org
18
The categories of this paper are: econ
4
The categories of this paper are: cond-mat