Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An O(D,D) Invariant Hamiltonian Action for the Superstring   We construct O(D,D) invariant actions for the bosonic string and RNS
superstring, using Hamiltonian methods and ideas from double field theory. In
this framework the doubled coordinates of double field theory appear as
coordinates on phase space and T-duality becomes a canonical transformation.
Requiring the algebra of constraints to close leads to the section condition,
which splits the phase space coordinates into spacetime coordinates and
momenta.

37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
4
The categories of this paper are: cond-mat
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat
23
The categories of this paper are: solv-int