Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Phase space methods for particles on a circle   The phase space $S\times Z$ for a particle on a circle is considered.
Displacement operators in this phase space are introduced and their properties
are studied. Wigner and Weyl functions in this context are also considered and
their physical interpretation and properties are discussed. All results are
compared and contrasted with the corresponding ones for the harmonic oscillator
in the $R \times R$ phase space.

30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
11
The categories of this paper are: hep-lat
19
The categories of this paper are: eess
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int
5
The categories of this paper are: gr-qc
20
The categories of this paper are: acc-phys