In this work, considering a special subclass of the family of holomorphic functions in an open
unit disk, defined by means of quasi-subordination, we determine sharp bounds for Fekete …

Considering two special families of regular functions in an open unit disk based on quasi-
subordination, we present sharp bounds for initial coefficient estimates and also determine …

In the present paper, we introduce a certain subclass K Σ Q λ, γ, χ of bi-univalent functions
defined in the open unit disk by means of quasi-subordination. Sharp bounds of the initial …

In the current paper, we define some subclasses of holomorphic functions in the open disk 𝑈
that are defined by the differential operator. These subclasses are defined in the open disk …

In the current work, special subfamilies of holomorphic bi-univalent functions based on quasi-
subordination are introduced. Initial coefficient estimates for functions belonging to these …

In this present investigation, we introduce a certain subclass Sq (λ, γ, h) of analytic functions
which is specify in terms of a quasi-subordination. Sharp bounds of the Fekete-Szego …

1 Introduction and definitions Page 1 Bulletin of the Transilvania University of Brasov • Vol
12(61), No. 2 - 2019 Series III: Mathematics, Informatics, Physics, 221-232 https://doi.org/10.31926/but.mif.2019.12.61.2.3 …

Earthline Journal of Mathematical Sciences Page 1 Earthline Publishers 1, Kailsa Street,
Madanambedu, Sathyavedu Chittoor 517588, Andhra Pradesh, INDIA www.earthlinepublishers.com …