Autor:	Norlyda Mohamed, Aminah Abdul Malek, Nurhanis Abdul Rahman, Nur Hawani Roslan, Zammariyah Mustafa Kamal
Rok vydání:	2019
Předmět:	Combinatorics Class (set theory) Unit disk Upper and lower bounds Subclass Mathematics Analytic function
Zdroj:	THE 4TH INNOVATION AND ANALYTICS CONFERENCE & EXHIBITION (IACE 2019).
ISSN:	0094-243X
DOI:	10.1063/1.5121061
Popis:	Denote S*(α, β, δ) as the subclass of analytic functions f defined by f(z)=z+∑n=2∞anzn that satisfied Reeiδ{ zf′(z)+αz2f″(z)f(z) }>β in open unit disk, z∈D={z:\|z\| 0. In this paper, we obtain sharp upper bound for the second Hankel determinant, \|a2a4 − a32\| for functions belonging to this subclass of functions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d2d08e92e5ea319e93614ab4ac044682 https://doi.org/10.1063/1.5121061 Zobrazit plný text záznamu