Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On Dark Energy and Dark Matter (Part II)   Phenomena currently attributed to Dark Matter (DM) and Dark Energy (DE) are
merely a result of the interplay between gravitational energy density, caused
by the contraction of space by matter, and space dilation, caused by the energy
density of the Cosmological Microwave Background (CMB). This interplay causes
inhomogeneous and anisotropic expansion, in and around galaxies, where as the
expansion of the universe, when viewed globally, is homogeneous and isotropic.
These contentions lead to a theoretical derivation of the gravitational central
acceleration in and around galaxies, and the determination of g0, the central
acceleration where falttening of Rotation Curves (RC) replaces Keplerian
behavior. Our results, which fit the observed flattening of RCs, resemble the
phenomenological Tully-Fisher and Millgrom MOND relations. However, our central
acceleration, g0, depends on the CMB energy density at the time of formation of
a galaxy and, as opposed to MOND, is not a universal constant.

7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc
16
The categories of this paper are: stat
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
26
The categories of this paper are: bayes-an
4
The categories of this paper are: cond-mat
24
The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio