Instruct: Identify the main and secondary category of Arxiv papers based on the titles
Query: Sensitivity of new detection method for ultra-low frequency
  gravitational waves with pulsar spin-down rate statistics
1
The categories of this paper are: cs
16
The categories of this paper are: stat
18
The categories of this paper are: econ
2
The categories of this paper are: math
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org
29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg