Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum corrections to gravity   This paper revisits quantum corrections to gravity. It was shown previously
by other authors that quantum field theories in curved space time provide
quadratic curvature forms as quantum corrections to gravity in a conformally
flat metric. Application to a spherically symmetric and static (SSS) metric
shows that only the Gauss Bonnet combination (GB) yields the correct
expression. Using a variational method, the author shows that the metric he
obtained in 1985 as an example in a simplified case was indeed the exact
solution for a SSS metric. This proves that gravity becomes repulsive at short
distances by quantum corrections.

22
The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat
21
The categories of this paper are: adap-org
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
19
The categories of this paper are: eess