Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Low energy physics and properties of extra space   The mechanism of low energy physics formation in the framework of
multidimensional gravity is discussed. It is shown that a wide set of
parameters of a primary theory could lead to the observable Universe. Quantum
fluctuations of extra space metric and its consequent classical evolution play
an important role in this process.

18
The categories of this paper are: econ
26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex
24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
27
The categories of this paper are: comp-gas
32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg