Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A constructive version of the Boyle-Handelman theorem on the spectra of
  nonnegative matrices   A constructive version of the celebrated Boyle-Handelman theorem on the
non-zero spectra of nonnegative matrices is presented.

36
The categories of this paper are: cmp-lg
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
3
The categories of this paper are: physics
8
The categories of this paper are: hep-ex
14
The categories of this paper are: math-ph
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs
4
The categories of this paper are: cond-mat
6
The categories of this paper are: astro-ph