Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Charged Quantum Fields Associated with Endomorphisms of CAR and CCR
  Algebras   Quasi-free endomorphisms of the CAR and CCR algebras are studied from the
point of view of the theory of superselection sectors.

9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics
32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
6
The categories of this paper are: astro-ph
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
19
The categories of this paper are: eess