On Salagean type pseudo-starlike functions

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Atıf İçin Kopyala

ALTINKAYA Ş., SAĞLAM ÖZKAN Y.

ACTA ET COMMENTATIONES UNIVERSITATIS TARTUENSIS DE MATHEMATICA, cilt.21, sa.2, ss.275-285, 2017 (ESCI)

• Yayın Türü: Makale / Tam Makale
• Cilt numarası: 21 Sayı: 2
• Basım Tarihi: 2017
• Doi Numarası: 10.12697/acutm.2017.21.19
• Dergi Adı: ACTA ET COMMENTATIONES UNIVERSITATIS TARTUENSIS DE MATHEMATICA
• Derginin Tarandığı İndeksler: Emerging Sources Citation Index (ESCI), Scopus
• Sayfa Sayıları: ss.275-285
• Bursa Uludağ Üniversitesi Adresli: Evet

Özet

We construct two new subclasses of univalent functions in the open unit disk U = {z : vertical bar z vertical bar < 1 . For the first class ( pound lambda)(beta) of Salagean type lambda--pseudo-starlike functions, using the sigmoid function, we establish upper bounds for the initial coefficients of the functions in this class. Furthermore, for the second class ( pound lambda)(beta, phi) we obtain Fekete-Szego inequalities. The results presented in this paper generalize the recent work of Babalola.