Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Contractibility of the Space of Opers for Classical Groups   The geometric Langlands program is an exciting direction of research,
although a lot of progress has been made there are still open questions and
gaps. One of the necessary steps for this program is the proof of the existence
and the cohomological triviality (more precisely, the O- contractibility) of
the space of rational opers. In this paper, we prove the homotopical
contractibility of the space of rational opers for classical groups.

16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
6
The categories of this paper are: astro-ph
19
The categories of this paper are: eess
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph