Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Black hole solution in third order Lovelock gravity has no Gauss-Bonnet
  limit   We revisit the spherically symmetric third order Lovelock black hole solution
in 7-dimensions. We show that the general solution for the metric function does
not admit the Gauss-Bonnet (GB) limit. This is not expected due to the linear
superposition of the second (GB) and third order Lovelock Lagrangians in the
general action. It is found that the two branches of the GB solutions are
indeed the limit of the other two complex solutions of the field equations in
the third order Lovelock gravity. These two complex solutions could not be
accepted as the solutions of the Einstein's field equations which are supposed
to be real values function on entire real r- axis. A new solution which is only
valid if the third order Lovelock parameter is small is introduced which can be
considered as the natural extension of the general relativity (GR) to the third
order Lovelock modified theory of gravity. We also generalize the discussion to
the higher dimensional third order Lovelock gravity coupled to the matter
sources with cosmological constant.

16
The categories of this paper are: stat
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th
17
The categories of this paper are: q-fin
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex