Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Conformal symmetry of superstrings on $AdS_3\times S^3\times T^4$ and
  D1/D5 system   Conformal field theory of the D1/D5 system and superstrings on $AdS_3\times
S^3\times T^4$ is studied with particular attention to the world-sheet fields
corresponding to the $T^4$ part. A solution to the spacetime N=4 superconformal
symmetry doubling and other problems is proposed. It is argued that the
relevant spacetime symmetry should be based on the middle N=4 superconformal
algebra. It is discussed as to why this superconformal structure has been
missed so far.

12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
19
The categories of this paper are: eess
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
23
The categories of this paper are: solv-int
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
14
The categories of this paper are: math-ph
30
The categories of this paper are: q-alg
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph
34
The categories of this paper are: chem-ph