Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Generalized metric formulation of double field theory   The generalized metric is a T-duality covariant symmetric matrix constructed
from the metric and two-form gauge field and arises in generalized geometry. We
view it here as a metric on the doubled spacetime and use it to give a simple
formulation with manifest T-duality of the double field theory that describes
the massless sector of closed strings. The gauge transformations are written in
terms of a generalized Lie derivative whose commutator algebra is defined by a
double field theory extension of the Courant bracket.

4
The categories of this paper are: cond-mat
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
37
The categories of this paper are: supr-con
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
23
The categories of this paper are: solv-int
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc