Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A system of hypergeometric differential equations in two variables of
  rank 9   We study a hypergeometric function in two variables and a system of
hypergeometric differential equations associated with this function. This is a
regular holonomic system of rank $9$. We give a fundamental system of solutions
to this system in terms of this hypergeometric series. We give circuit matrices
along generators of the fundamental group of the complement of its singular
locus with respect to our fundamental system.

13
The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
7
The categories of this paper are: hep-th