Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A New Class of Parametrization for Dark Energy without Divergence   In this paper, we propose a new class of parametrization of the equation of
state of dark energy. In contrast with the famous CPL parametrization, these
new parametrization of the equation of state does not divergent during the
evolution of the Universe even in the future. Also, we perform a observational
constraint on two simplest dark energy models belonging to this new class of
parametrization, by using the Markov Chain Monte Carlo (MCMC) method and the
combined latest observational data from the type Ia supernova compilations
including Union2(557), cosmic microwave background, and baryon acoustic
oscillation.

14
The categories of this paper are: math-ph
13
The categories of this paper are: quant-ph
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
19
The categories of this paper are: eess
1
The categories of this paper are: cs
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an