Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A semiclassical perspective on multivariate orthogonal polynomials   Differential properties for orthogonal polynomials in several variables are
studied. We consider multivariate orthogonal polynomials whose gradients
satisfy some quasi--orthogonality conditions. We obtain several
characterizations for these polynomials including the analogous of the
semiclassical Pearson differential equation, the structure relation and a
differential--difference equation.

31
The categories of this paper are: ao-sci
3
The categories of this paper are: physics
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
29
The categories of this paper are: funct-an
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th