V. K. Jain, V. Tewary: A refinement of Cauchy's bound for the moduli of zeros of a polynomial, 173-185


A refinement of Cauchy's bound

$\displaystyle \vert z\vert < 1 + \max_{0\leq k \leq n-1} \vert a_k\vert$    

for the moduli of all the zeros of the polynomial

$\displaystyle z^n + a_{n-1}z^{n-1} + a_{n-2}z^{n-2} + \hdots + a_0$    

has been obtained.

Key Words: refinement, zeros, polynomial, moduli, Cauchy's bound.

2010 Mathematics Subject Classification: Primary 30C15, Secondary 30C10.