Abstract
Let P(z) be s polynomial of degree n having all its zeros in |z| ≤ k, k ≥ 1. In this paper, we shall generalize a result of Aziz and Rather [2] which in turn provides an improvement of a recent result of Dewan et al. [4]. Also a refinement of a result of Shah [10] for the polar derivative of a polynomial has been obtained by using the location of the zeros of P(z).
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Submitted by F.G. Avkhadiev
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Mir, A., Baba, S.A. Some inequalities concerning polar derivative of a polynomial. Addendum. Lobachevskii J Math 32, 231–237 (2011). https://doi.org/10.1134/S1995080211030103
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DOI: https://doi.org/10.1134/S1995080211030103