Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Growth functions of Coxeter groups, Poincare series of singularities and
  $2$-tangle $q$-fractions   Growth functions of Coxeter groups and the Poincare series of Kleinian and
Fuchsian singularities are $2$-tangle $q$-fractions.

19
The categories of this paper are: eess
33
The categories of this paper are: plasm-ph
3
The categories of this paper are: physics
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
35
The categories of this paper are: mtrl-th
36
The categories of this paper are: cmp-lg
32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas