Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An introduction to upper half plane polynomials   This is a straightforward introduction to the properties of polynomials in
many variables that do not vanish in the open upper half plane. Such
polynomials generalize many of the well-known properties of polynomials with
all real roots.

1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
3
The categories of this paper are: physics
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
16
The categories of this paper are: stat
13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
20
The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc