Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Symmetries between Untwisted and Twisted Strings on Asymmetric Orbifolds   We study symmetries between untwisted and twisted strings on asymmetric
orbifolds. We present a list of asymmetric orbifold models to possess
intertwining currents which convert untwisted string states to twisted ones,
and vice versa. We also present a list of heterotic strings on asymmetric
orbifolds with supersymmetry between untwisted and twisted string states. Some
of properties inherent in asymmetric orbifolds, which are not shared by
symmetric orbifolds, are pointed out.

25
The categories of this paper are: patt-sol
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
0
The categories of this paper are: hep-ph
34
The categories of this paper are: chem-ph
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
16
The categories of this paper are: stat
5
The categories of this paper are: gr-qc