Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comment on "Dual path integral representation for finite temperature
  quantum field theory"   I show that the novel dual path integral representation for finite
temperature quantum field theory proposed in [Phys. Rev. D 77, 105030 (2008),
arXiv:0803.1667 ] is a well-known representation of quantum mechanics in terms
of symbols of operators.

10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom
12
The categories of this paper are: nucl-th
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
16
The categories of this paper are: stat
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an