Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Born Reciprocity in String Theory and the Nature of Spacetime   After many years, the deep nature of spacetime in string theory remains an
enigma. In this letter we incorporate the concept of Born reciprocity in order
to provide a new point of view on string theory in which spacetime is a derived
dynamical concept. This viewpoint may be thought of as a dynamical chiral phase
space formulation of string theory, in which Born reciprocity is implemented as
a choice of a Lagrangian submanifold of the phase space, and amounts to a
generalization of T-duality. In this approach the fundamental symmetry of
string theory contains phase space diffeomorphism invariance and the underlying
string geometry should be understood in terms of dynamical bi-Lagrangian
manifolds and an apparently new geometric structure, somewhat reminiscent of
para-quaternionic geometry, which we call Born geometry.

11
The categories of this paper are: hep-lat
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
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The categories of this paper are: eess
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
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The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin
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The categories of this paper are: q-fin
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The categories of this paper are: dg-ga