Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Torsion of Space-time in f(R) gravity   In this paper, we first review some aspects of the f(R) gravity and then the
concept of torsion of space-time due to metric-affine formalism in f(R) gravity
is studied. Within this formalism in which the matter action is supposed to
dependent on the connection, we achieve to interesting cases including non-zero
torsion tensor. Then with the physical interpretation of torsion of space-time
in high energy limit, the modified expression of Mach's principle in a very
strong gravitational region is obtained.

8
The categories of this paper are: hep-ex
24
The categories of this paper are: dg-ga
2
The categories of this paper are: math
34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
14
The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol