Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: String Theory has no Isotropic Solution for the Modified Einstein's
  Equations without the Dilaton   We investigate the modification to Einstein's vacuum field equations which is
imposed by string theory when the dilaton field is ignored. Including the
cosmological constant in all calculations, we prove that such a theory of
gravity admits no static isotropic solution. We then show that any isotropic
solution of the equations in question must necessarily be static, therefore
proving that no isotropic solution exists for this stringy modification to
gravity.

22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th
21
The categories of this paper are: adap-org
3
The categories of this paper are: physics
18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
20
The categories of this paper are: acc-phys
24
The categories of this paper are: dg-ga
11
The categories of this paper are: hep-lat