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This article is cited in 1 scientific paper (total in 1 paper)
Real, complex and functional analysis
Distortion theorem for complex polynomials
V. N. Dubininab a Institute for Applied Mathematics, Far-Eastern Branch of the RAS
st. Radio, 7,
690041, Vladivostok, Russia
b Far-Eastern Federal University,
st. Sukhanov, 8,
690950, Vladivostok, Russia
Abstract:
For any complex polynomial $P$ of degree $n\ge 2$ and any complex number $z$, we consider a sharp inequality involving of the absolute values of $P(z),\; P'(z)$, leading coefficient of $P$ and an upper bound of the moduli of the critical values of $P$. All cases of an equality in this inequality are established.
Keywords:
distortion theorems, complex polynomials, inequalities, critical values.
Received November 2, 2018, published November 9, 2018
Citation:
V. N. Dubinin, “Distortion theorem for complex polynomials”, Sib. Èlektron. Mat. Izv., 15 (2018), 1410–1415
Linking options:
https://www.mathnet.ru/eng/semr1021 https://www.mathnet.ru/eng/semr/v15/p1410
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Abstract page: | 205 | Full-text PDF : | 53 | References: | 30 |
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