Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Tilted Bianchi Type V Bulk Viscous Cosmological Models with Varying
  $\Lambda$-Term   Conformally flat tilted Bianchi type V cosmological models in presence of a
bulk viscous fluid and heat flow are investigated. The coefficient of bulk
viscosity is assumed to be a power function of mass density. The cosmological
constant is found to be a decreasing function of time, which is supported by
results from recent type Ia supernovae observations. Some physical and
geometric aspects of the models are also discussed.

2
The categories of this paper are: math
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
7
The categories of this paper are: hep-th
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
1
The categories of this paper are: cs