On the Fekete–Szegö Problem for Certain Classes of (γ,δ)-Starlike and (γ,δ)-Convex Functions Related to Quasi-Subordinations

Autor: Norah Saud Almutairi, Awatef Shahen, Adriana Cătaş, Hanan Darwish
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Symmetry, Vol 16, Iss 8, p 1043 (2024)
Druh dokumentu: article
ISSN: 2073-8994
DOI: 10.3390/sym16081043
Popis: In the present paper, we propose new generalized classes of (p,q)-starlike and (p,q)-convex functions. These classes are introduced by making use of a (p,q)-derivative operator. There are established Fekete–Szegö estimates |a3−μa22| for functions belonging to the newly introduced subclasses. Certain subclasses of analytic univalent functions associated with quasi-subordination are defined.
Databáze: Directory of Open Access Journals
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