Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Thermal and electromagnetic properties of Bi$_2$Sr$_2$CaCu$_2$O$_8$
  intrinsic Josephson junction stacks studied via one-dimensional coupled
  sine-Gordon equations
14
The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
22
The categories of this paper are: chao-dyn
25
The categories of this paper are: patt-sol
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
27
The categories of this paper are: comp-gas