Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A distribution of the temperature in a ring of the incompressible,
  viscous liquid with two free boundaries. Exact solutions   It has been found the exact solutions for nonstationary distribution of the
temperature in the liquid ring with two viscosities and two free boundaries of
the ring.

7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
16
The categories of this paper are: stat
17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
5
The categories of this paper are: gr-qc
6
The categories of this paper are: astro-ph
19
The categories of this paper are: eess
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
1
The categories of this paper are: cs
0
The categories of this paper are: hep-ph
29
The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat