Bi-concave functions involving a differential operator
Journal of Mathematical Extension, cilt.13, sa.2, ss.111-122, 2019 (ESCI)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 13 Sayı: 2
- Basım Tarihi: 2019
- Dergi Adı: Journal of Mathematical Extension
- Derginin Tarandığı İndeksler: Emerging Sources Citation Index (ESCI)
- Sayfa Sayıları: ss.111-122
- Bursa Uludağ Üniversitesi Adresli: Evet
Özet
The purpose of the present paper is to introduce a class (D lambda,delta C0)-C-k,alpha(beta) of bi-concave functions defined by a differential operator. We find estimates on the Taylor-Maclaurin coefficients vertical bar a(2)vertical bar and vertical bar a(3)vertical bar for functions in this class. Several consequences of these results are also pointed out in the form of corollaries.