Geodesic
Inequalities concerning polar derivative of polynomials
Annales Universitatis Mariae Curie-Skłodowska. Mathematica , Tome 65 (2011) no. 1.

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In this paper we obtain certain results for the polar derivative of a polynomial p(z) = c_nz^n +∑_j=μ^n c_n-jz^n-j, 1≤μ≤ n, having all its zeros on |z| = k, k≤ 1, which generalizes the results due to Dewan and Mir, Dewan and Hans. We also obtain certain new inequalities concerning the maximum modulus of a polynomial with restricted zeros. [Editor's note: There are flaws in the paper, see M. A. Qazi, Remarks on some recent results about polynomials with restricted zeros, Ann. Univ. Mariae Curie-Skłodowska Sect. A 67 (2), (2013), 59-64 ]
Keywords: Polynomials, maximum modulus, inequalities in the complex domain, polar derivative 
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Ahuja, Arty; Dewan, K. K.; Hans, Sunil. Inequalities concerning polar derivative of polynomials. Annales Universitatis Mariae Curie-Skłodowska. Mathematica , Tome 65 (2011) no. 1. http://geodesic.mathdoc.fr/item/AUM_2011_65_1_a3/

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