Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A generalized equation of state for dark energy   A generalized parameterization $w_\beta(z)$ for the dark energy equation of
state (EoS) is proposed and some of its cosmological consequences are
investigated. We show that in the limit of the characteristic dimensionless
parameter $\beta \to +1, 0$ and -1 some well-known EoS parameterizations are
fully recovered whereas for other values of $\beta$ the proposed
parameterization admits a wider and new range of cosmological solutions. We
also discuss possible constraints on the $w_\beta(z)$ parameters from current
observational data.

16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
26
The categories of this paper are: bayes-an
33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
13
The categories of this paper are: quant-ph
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys