Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An Isotropic Metric   An isotropic metric for a black hole and a better vacuum condition \nabla^2
V_G =0 are presented which yield distinct terms for the energy densities of
ordinary matter and gravitational fields in the Einstein tensor (G^44 =-g^2
(2\nabla^2 V_G +(\nabla V_G)^2)) This model resolves an inconsistency between
electromagnetism and gravity in the calculation of field energy. Resolution of
this inconsistency suggests a slight modification of the Einstein equation to
gG^\mu\nu = 8\pi G T^\mu\nu.

18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
22
The categories of this paper are: chao-dyn
5
The categories of this paper are: gr-qc
2
The categories of this paper are: math
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
11
The categories of this paper are: hep-lat