Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hypergeometric functions related to Schur Q-polynomials and BKP equation   We introduce hypergeometric functions related to projective Schur functions
$Q_{\lambda}$ and describe their properties. Linear equations, integral
representations and Pfaffian representations are obtained. These hypergeometric
functions are vacuum expectations of free fermion fields, and thus these
functions are tau functions of the so-called BKP hierarchy of integrable
equations.

13
The categories of this paper are: quant-ph
17
The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
5
The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
6
The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn