Teorema de Stieltjes e zeros de polinômios ortogonais clássicos

Abstract

The main goal of this work is to extend a classical result about monotonicity of zeros of classical orthogonal polynomials of a continuous variable to monotonicity of zeros of classical orthogonal polynomials of a discrete variable. First, we introduce the classical orthogonal polynomials of a continuous variable and the classical orthogonal polynomials of a discrete variable, and present the Stieltjes' Theorem, using it to obtain the monotonicity of zeros of classical orthogonal polynomials of a continuous variable. Then we prove an extension of this theorem and obtain the monotonicity of zeros of the classical orthogonal polynomials of a discrete variable.