Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New Developments on Gravitational Force and Nonlinear Oscillations of
  Space   This paper contains results obtained as solutions of the Unified Field Theory
equations. It yields space nonlinear oscillations, a quartet of gravitational
forces, quintessence, and replaces Einstein's Cosmological Constant by an
invariant parameter $r_0$ which prevails over the entire evolution of the
Universe.

14
The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs
0
The categories of this paper are: hep-ph
13
The categories of this paper are: quant-ph
24
The categories of this paper are: dg-ga
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
4
The categories of this paper are: cond-mat
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an