Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Way to the Dark Side of the Universe through Extra Dimensions   As indicated by Einstein's general relativity, matter and geometry are two
faces of a single nature. In our point of view, extra dimensions, as a member
of the {\em geometry face}, will be treated as a part of the {\em matter face}
when they are beyond our poor vision, thereby providing dark energy sources
effectively. The geometrical structure and the evolution pattern of extra
dimensions therefore may play an important role in cosmology. Various possible
impacts of extra dimensions on cosmology are investigated. In one way, the
evolution of homogeneous extra dimensions may contribute to dark energy,
driving the accelerating expansion of the universe. In the other way, both the
energy perturbations in the ordinary three-space, combined with homogeneous
extra dimensions, and the inhomogeneities in the extra space may contribute to
dark matter. In this paper we wish to sketch the basic idea and show how extra
dimensions may lead to the dark side of our universe.

17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg
23
The categories of this paper are: solv-int
13
The categories of this paper are: quant-ph
16
The categories of this paper are: stat
9
The categories of this paper are: nlin
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
15
The categories of this paper are: nucl-ex
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph