Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A simple sufficient condition for triviality of obstruction in the
  orbifold construction for subfactors   We present a simple sufficient condition for triviality of obstruction in the
orbifold construction. As an application, we can show the existence of
subfactors with principal graph $D_{2n}$ without full use of Ocneanu's
paragroup theory.

13
The categories of this paper are: quant-ph
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
8
The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
9
The categories of this paper are: nlin
4
The categories of this paper are: cond-mat