QUASI-SUBORDINATION AND COEFFICIENT BOUNDS FOR CERTAIN CLASSES OF MEROMORPHIC FUNCTIONS OF COMPLEX ORDER

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Zayed H. M., Bulut S., Mostafa A. O.

Communications Faculty of Sciences University of Ankara Series A2-A3: Physical Sciences and Engineering, cilt.68, sa.1, ss.1197-1205, 2019 (Hakemli Dergi)

• Yayın Türü: Makale / Tam Makale
• Cilt numarası: 68 Sayı: 1
• Basım Tarihi: 2019
• Doi Numarası: 10.31801/cfsuasmas.513114
• Dergi Adı: Communications Faculty of Sciences University of Ankara Series A2-A3: Physical Sciences and Engineering
• Derginin Tarandığı İndeksler: TR DİZİN (ULAKBİM)
• Sayfa Sayıları: ss.1197-1205
• Anahtar Kelimeler: Analytic, meromorphic, starlike function, Fekete-Szego problem, convolution, subordination, quasi-subordination, Bessel function
• Kocaeli Üniversitesi Adresli: Evet

Özet

In this paper, we obtain Fekete-Szego functional vertical bar a(1) - mu a(0)(2)vertical bar for functions of the classes Sigma*(q) (phi) and Sigma*q,lambda,b (g, phi) using quasi-subordination. Sharp bounds for the Fekete-Szego functional vertical bar a(1) - mu a(0)(2)vertical bar are obtained. Also, applications of the main results for subclasses of functions de.ned by Bessel function are also considered.