Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Vacuum response to cosmic stretching: accelerated Universe and
  prevention of singularity   Spacetime stretching is included in the general relativity alongside with the
spacetime curvature. Response of the vacuum to cosmic stretching is considered
as macroscopic quantum effect. This effect explains the accelerated expansion
of the Universe without resorting to Plank scale. For negative stretching
(collapse) the same effect can prevent formation of singularity. Stretching
effect can be important for a variety of cosmic phenomena, including collisions
of galaxies and local collapses.

33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio