Quasi-subordination and coefficient bounds for certain classes of meromorphic functions of complex order

Zayed, H; Bulut, SERAP; Mostafa, A

doi:10.31801/cfsuasmas.513114

Quasi-subordination and coefficient bounds for certain classes of meromorphic functions of complex order

Communications Faculty of Sciences University of Ankara Series A1-Mathematics and Statistics, cilt.68, sa.1, ss.1197-1205, 2019 (ESCI)

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 A1-Mathematics and Statistics
Derginin Tarandığı İndeksler: Emerging Sources Citation Index (ESCI), 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.