Extension of Irreducibility results on Generalised Laguerre Polynomials $L_n^{(-1-n-s)}(x)$

TL;DR

This paper extends the known irreducibility range of Generalised Laguerre Polynomials with negative parameters from s ≤ 60 to s ≤ 88, providing new insights into their algebraic properties.

Contribution

The authors significantly improve the irreducibility results for a family of Generalised Laguerre Polynomials for negative integral parameters.

Findings

Irreducibility proven for s ≤ 88

Extended previous bounds from s ≤ 60

Enhances understanding of polynomial algebraic structure

Abstract

We consider the irreducibility of Generalised Laguerre Polynomials for negative integral values given by $L_n^{(-1-n-s)}(x)=\displaystyle\sum_{j=0}^{n}\binom{n-j+s}{n-j}\frac{x^j}{j!}.$ For different values of $s,$ this family gives polynomials which are of great interest. It was proved earlier that for $0 \leq s \leq 60,$ these polynomials are irreducible over $\mathbb{Q}.$ In this paper we improve this result upto $s \leq 88.$