Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The $\Omega_{DE}-\Omega_{M}$ Plane in Dark Energy Cosmology   The dark energy cosmology with the equation of state $w=constant$ is
considered in this paper. The $\Omega_{DE}-\Omega_{M}$ plane has been used to
study the present state and expansion history of the universe. Through the
mathematical analysis, we give the theoretical constraint of cosmological
parameters. Together with some observations such as the transition redshift
from deceleration to acceleration, more precise constraint on cosmological
parameters can be acquired.

25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
10
The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
23
The categories of this paper are: solv-int
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
16
The categories of this paper are: stat
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
3
The categories of this paper are: physics
4
The categories of this paper are: cond-mat