“…Some more results related to inequalities that compares the growth of a polynomial on |z| = r and |z| = R, where r < R, can be found in (see [4,8]).…”
Section: Introduction and Statement Of Resultsmentioning
“…Some more results related to inequalities that compares the growth of a polynomial on |z| = r and |z| = R, where r < R, can be found in (see [4,8]).…”
Section: Introduction and Statement Of Resultsmentioning
“…The result is sharp and equality holds for the polynomial P(z) = αz n + β with |α| = |β|. Recently, A.Zireh et al [7] have generalised inequality (1.4) and some results due to Dewan and Hans [4]. In fact they have considered the zeros of largest moduli and proved the following results.…”
Section: Introduction and Statement Of Resultsmentioning
Let P(z) be a polynomial of degree n having all its zeros in |z|≤k, k ≤1, then for every real or complex number β, with |β| ≤1 and R ≥1, it was shown by A.Zireh et al. [7] that for |z| = 1, min |z|=1 P(Rz)+ β R+k 1+k n
“…For the class of polynomials having no zeros in |z| < 1, the inequalities (1.1) and (1.2) are sharpened by Ankeny and Rivlin [1] and Rivlin [12], by proving following inequality (1. There are several results concerning the refinement and generalizations of above mentioned inequalities (see [5], [7] and [14]).…”
Let p(z) be a polynomial of degree n. We have several results for the bounds of maximum modulus of polynomial in terms of coefficients of polynomial and radius of the disk having no zeros in it. In this paper we have proved some results for the bounds of maximum modulus of polynomial not vanishing in a disk of greater or smaller than unity. Our results improve the earlier proved results.
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