Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Filter integrals for orthogonal polynomials   Motivated by an expression by Persson and Strang on an integral involving
Legendre polynomials, stating that the square of $P_{2n+1}(x)/x$ integrated
over $[-1,1]$ is always $2$, we present analog results for Hermite, Chebyshev,
Laguerre and Gegenbauer polynomials as well as the original Legendre polynomial
with even index.

22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th
16
The categories of this paper are: stat
18
The categories of this paper are: econ
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
14
The categories of this paper are: math-ph
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con