Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bohr-van Leeuwen theorem in non-commutative space   Bohr-van Leeuwen theorem has been studied in non-commutative space where the
space coordinates do not commute. It has been found that in non-commutative
space Bohr-van Leeuwen theorem, in general, is not satisfied and a classical
treatment of the partition function of charged particles in a magnetic field
gives rise to non zero magnetization.

0
The categories of this paper are: hep-ph
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
2
The categories of this paper are: math
18
The categories of this paper are: econ
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
4
The categories of this paper are: cond-mat
33
The categories of this paper are: plasm-ph
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys