Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Aspects of noncommutative descriptions of planar systems in high
  magnetic fields   We study some aspects of recent proposals to use the noncommutative
Chern-Simons theory as an effective description of some planar condensed matter
models in strong magnetic fields, such as the Quantum Hall Effect. We present
an alternative justification for such a description, which may be extended to
other planar systems where a uniform magnetic field is present.

26
The categories of this paper are: bayes-an
25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
34
The categories of this paper are: chem-ph