Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comment on the paper "Third-harmonic generation investigated by a
  short-range bottomless exponential potential well" by M. Hu, K. Guo, Q. Yu,
  Z. Zhang [Superlattices and Microstructures, 122 (2018) 538-547]
23
The categories of this paper are: solv-int
8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
14
The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys
24
The categories of this paper are: dg-ga
2
The categories of this paper are: math
1
The categories of this paper are: cs
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
15
The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin