On a Fekete–Szegö Problem Associated with Generalized Telephone Numbers

Daniel Breaz, Abbas Kareem Wanas, Fethiye Müge Sakar () and Seher Melike Aydoǧan
Additional contact information
Daniel Breaz: Department of Mathematics, “1 Decembrie 1918” University of Alba-Iulia, 510009 Alba Iulia, Romania
Abbas Kareem Wanas: Department of Mathematics, University of Al-Qadisiyah, Al Diwaniyah 58001, Al-Qadisiyah, Iraq
Fethiye Müge Sakar: Department of Management, Dicle University, Diyarbakir 21280, Turkey
Seher Melike Aydoǧan: Department of Mathematics, Istanbul Technical University, Istanbul 34469, Turkey

Mathematics, 2023, vol. 11, issue 15, 1-8

Abstract: One of the important problems regarding coefficients of analytical functions (i.e., Fekete–Szegö inequality) was raised by Fekete and Szegö in 1933. The results of this research are dedicated to determine upper coefficient estimates and the Fekete–Szegö problem in the class W ? ( ? , ? ; ? ) , which is defined by generalized telephone numbers. We also indicate some specific conditions and consequences of results found by us.

Keywords: bi-univalent function; holormorphic function; upper bounds; telephone numbers; Fekete–Szegö problem (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2227-7390/11/15/3304/pdf (application/pdf)
https://www.mdpi.com/2227-7390/11/15/3304/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jmathe:v:11:y:2023:i:15:p:3304-:d:1203962

Access Statistics for this article

Mathematics is currently edited by Ms. Emma He

More articles in Mathematics from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().