Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comprendre l atmosphere du Soleil et celles des etoiles variables a la
  fin du 19e siecle or, Understanding the Sun and variable stars atmospheres at
  the end of the 19th Century   Guy Boistel questions the Sun / variable stars analogy at the heart of the
work of Dutch astronomer Albert Brester. The problem of interdisciplinarity
appears in the objectification of the Sun at the end of the 19th century: it is
by mixing astronomy, physics and chemistry that Brester tried to apply
knowledge of the solar atmosphere to the understanding of variable stars, a
fairly confidential field of study still at that time.

13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph