Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Better Way to Reconstruct Dark Energy Models ?   To reconstruct dark energy models the redshift $z_{eq}$, marking the end of
radiation era and the beginning of matter-dominated era, can play a role as
important as $z_{t}$, the redshift at which deceleration parameter experiences
a signature flip. To implement the idea we propose a variable equation of state
for matter that can bring a smooth transition from radiation to
matter-dominated era in a single model. A popular $\Lambda \propto \rho$ dark
energy model is chosen for demonstration but found to be unacceptable. An
alternative $\Lambda \propto \rho a^{3}$ model is proposed and found to be more
close to observation.

36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
2
The categories of this paper are: math
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an
19
The categories of this paper are: eess
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
10
The categories of this paper are: q-bio