UPPER BOUND OF SECOND HANKEL DETERMINANT FOR k-BI-SUBORDINATE FUNCTIONS

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Atıf İçin Kopyala

Motamednezhad A., Bulut S., Adegani E.

UNIVERSITY POLITEHNICA OF BUCHAREST SCIENTIFIC BULLETIN-SERIES A-APPLIED MATHEMATICS AND PHYSICS, cilt.81, ss.31-42, 2019 (SCI-Expanded)

• Yayın Türü: Makale / Tam Makale
• Cilt numarası: 81
• Basım Tarihi: 2019
• Dergi Adı: UNIVERSITY POLITEHNICA OF BUCHAREST SCIENTIFIC BULLETIN-SERIES A-APPLIED MATHEMATICS AND PHYSICS
• Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED)
• Sayfa Sayıları: ss.31-42
• Kocaeli Üniversitesi Adresli: Evet

Özet

In this work, we determine an upper bound of the functional H-2(2) = a(2)a(4) - a(3)(2) for functions belonging to a subclass of analytic bi-univalent functions which is defined by subordination conditions in the open unit disk D. In addition, we get a smaller upper bound and more accurate estimation than the previous results and we correct their mistake.