Point-wise estimates for the derivative of algebraic polynomials
نویسندگان
چکیده
We give a sufficient condition on coefficients $a_k$ of an algebraic polynomial $P(z)=\sum\limits_{k=0}^{n}a_kz^k$, $a_n\not=0,$ such that the pointwise Bernstein inequality $|P'(z)|\le n|P(z)|$ is true for all $z,\ |z|\le 1$.
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ژورنال
عنوان ژورنال: Matemati?nì studìï
سال: 2021
ISSN: ['2411-0620', '1027-4634']
DOI: https://doi.org/10.30970/ms.56.2.208-211