Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Yang-Mills, Gravity, and 2D String Symmetries   It is well known that by using the infinite dimensional symmetries that issue
from string theories, one can build 2D geometric field theories. These 2D field
theories can be identified with gravitational and gauge anomalies that arise in
the presence of background gauge and gravitational anomalies. In this work we
consider the background fields as residuum from reducing higher dimensional
field theories to two dimensions. This implies a new relationship between
string theory and field theories. We identify the isotropy equations of the
distinct orbits as the Gau\ss 's law constraints of a Yang-Mills theory coupled
to a gravitational theory that has been evaluated on a two-dimensional
manifold. We show explicitly how one may recover the higher dimensional
theories and extract this new theory of gravity and its coupling to Yang-Mills
theory. This gravitational theory is able to couple to Yang-Mills via a
torsion-like term and yet maintain gauge invariance. Also this new theory of
gravity suggest a natural distinction between cosmology and local gravitation.
We comment on the analogue of Chern-Simons theory for diffeomorphism, the
vacuum structure of gravity, and also the possibility of extracting explicit
realizations of distinct differentiable structures in four dimensions.

37
The categories of this paper are: supr-con
3
The categories of this paper are: physics
21
The categories of this paper are: adap-org
0
The categories of this paper are: hep-ph
25
The categories of this paper are: patt-sol
5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an
14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
2
The categories of this paper are: math