Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New holomorphically closed subalgebras of $C^*$-algebras of hyperbolic
  groups   We construct dense, unconditional subalgebras of the reduced group
$C^*$-algebra of a word-hyperbolic group, which are closed under holomorphic
functional calculus and possess many bounded traces. Applications to the cyclic
cohomology of group $C^*$-algebras and to delocalized $L^2$-invariants of
negatively curved manifolds are given.

9
The categories of this paper are: nlin
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
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The categories of this paper are: plasm-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
15
The categories of this paper are: nucl-ex