On Erdös-lax inequality concerning polynomials
نویسندگان
چکیده
Recently Milovanovic et al. [Bulletin T.CLIII de l?Aca?mie serbe des sciences arts - 2020.] proved that if P(z) ? Pn with no zeros in |z| < k, k 1, then, |P?(z)| ?P?/2 [n {n(k 1/k + 1) 2/k 1 (|c0| kn|cn|/|c0| kn|cn|)} |P(z)|2 ?P?2], = where c0 c1z ... cnzn is a polynomial of degree n. In this paper, we obtain some results concerning the class polynomials having s?fold zero at origin. These not only generalizes but also refines many well-known due to Milovanovic.
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ژورنال
عنوان ژورنال: Filomat
سال: 2022
ISSN: ['2406-0933', '0354-5180']
DOI: https://doi.org/10.2298/fil2218123w