Polynomial and polynomial inequalities

Author: P. Borwein et al.
Publisher:
Publish Date: 1997-09-01
Features:
Fragment: Introduction and Basic Properties Overview
The most basic and important theorem concerning polynomials is the Fundamental Theorem of Algebra. This theorem, which tells us that every polynomial factors completely over the complex numbers, is the starting point for this book. Some of the intricate relationships between the location of the zeros of a polynomial and its coefficients are explored in Section 2. The equally intricate relationships between the zeros of a polynomial and the zeros of its derivative or integral are the subject of Section 1.3. This chapter serves as a general introduction to the body of theory known as the geometry of polynomials. Highlights of this chapter include the Fundamental Theorem of Algebra, the Enestrom-Kakeya theorem, Lucas's theorem, and Walsh's two-circle theorem.
1.1 Polynomials and Rational Functions
The focus for this book is the polynomial of a single variable. This is an extended notion of the polynomial, as we will see later, but the most important examples are the algebraic and trigonometric polynomials, which we now define.