On Turan Type inequality for Quaternionic Canonical Generalized Polynomials

Abstract

This paper establishes Tur\'an-type inequalities for quaternionic canonical generalized polynomials with all zeros in the closed unit ball of radius $k \geq 1$. We extend the classical inequality due to Govil from the complex setting to the quaternionic framework. We prove that for certain classes of polynomials, the inequality \[\|P'\| \geq \frac{n}{1+k^n}\|P\|\] holds for all $k \geq 1$, where $n$ is the degree of the polynomial. Our main results provide sharp derivative estimates for quaternionic canonical generalized polynomials under specific algebraic conditions on their zeros. These findings contribute to the ongoing research of extending classical polynomial inequalities to the noncommutative setting of quaternions.