Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Graphs and CCR algebras   I introduce yet another way to associate a C*-algebra to a graph and
construct a simple nuclear C*-algebra that has irreducible representations both
on a separable and a nonseparable Hilbert space.

15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph
5
The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
29
The categories of this paper are: funct-an
26
The categories of this paper are: bayes-an
21
The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th