Instruct: Identify the main and secondary category of Arxiv papers based on the titles
Query: M-Theoretic Derivations of 4d-2d Dualities: From a Geometric Langlands
  Duality for Surfaces, to the AGT Correspondence, to Integrable Systems
8
The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph
25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
1
The categories of this paper are: cs
36
The categories of this paper are: cmp-lg
28
The categories of this paper are: alg-geom
26
The categories of this paper are: bayes-an
22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
19
The categories of this paper are: eess
30
The categories of this paper are: q-alg