Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A brief review of the 2d/4d correspondences   An elementary introduction to the 2d/4d correspondences is given. After
quickly reviewing the 2d q-deformed Yang-Mills theory and the Liouville theory,
we will introduce 4d theories obtained by coupling trifundamentals to SU(2)
gauge fields. We will then see concretely that the supersymmetric partition
function of these theories on S^3 x S^1 and on S^4 is given respectively by the
q-deformed Yang-Mills theory and the Liouville theory. After giving a short
discussion on how this correspondence may be understood from the viewpoint of
the 6d N=(2,0) theory, we conclude the review by enumerating future directions.
Most of the technical points will be referred to more detailed review articles.

31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
4
The categories of this paper are: cond-mat
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
6
The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph