Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Reply to "Comment on `Low-temperature phonon thermal conductivity of
  single-crystalline Nd$_2$CuO$_4$: Effects of sample size and surface
  roughness' " by Sun et al
21
The categories of this paper are: adap-org
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
19
The categories of this paper are: eess
2
The categories of this paper are: math
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an