Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Generalized gravity from modified DFT   Recently, generalized equations of type IIB supergravity have been derived
from the requirement of classical kappa-symmetry of type IIB superstring theory
in the Green-Schwarz formulation. These equations are covariant under
generalized T-duality transformations and hence one may expect a formulation
similar to double field theory (DFT). In this paper, we consider a modification
of the DFT equations of motion by relaxing a condition for the generalized
covariant derivative with an extra generalized vector. In this modified double
field theory (mDFT), we show that the flatness condition of the modified
generalized Ricci tensor leads to the NS-NS part of the generalized equations
of type IIB supergravity. In particular, the extra vector fields appearing in
the generalized equations correspond to the extra generalized vector in mDFT.
We also discuss duality symmetries and a modification of the string charge in
mDFT.

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The categories of this paper are: hep-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: eess
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The categories of this paper are: astro-ph
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The categories of this paper are: q-bio
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The categories of this paper are: econ
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-ex
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The categories of this paper are: alg-geom
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The categories of this paper are: physics
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The categories of this paper are: dg-ga
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The categories of this paper are: solv-int
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-lat
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The categories of this paper are: plasm-ph
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The categories of this paper are: quant-ph