In this paper, we investigate and introduce a new subclass of the function class Σ of analytic
bi-close-to-convex functions defined on U. For this new subclass, we determine the first two …

ON SUBCLASSES OF M-FOLD SYMMETRIC BI-UNIVALENT FUNCTIONS 1. Introduction Let
A denote the class of functions f(z) which are anal Page 1 TWMS J. App. and Eng. Math. V.11 …

In the present investigation, we introduce certain new subclasses of the class of biunivalent
functions in the open unit disc U={z:| z|< 1} defined by quasi‐subordination. We obtained …

In this paper, we consider a convex univalent function f α, β which maps the open unit disc 𝕌
onto the vertical strip domain Ω α, β={w∈ ℂ: α< ℜ<(w)< β} and introduce new subclasses of …

ON A SUBCLASS OF BI-CLOSE-TO-CONVEX FUNCTIONS BY MEANS OF THE
GEGENBAUER POLYNOMIAL 1. Introduction and preliminaries The theory Page 1 Math …

Using subordination, we introduce a new class of symmetric functions associated with a
vertical strip domain. We have provided some interesting deviations or adaptation which are …

In a very recent work, Şeker and Sümer Eker [On subclasses of bi-close-to-convex functions
related to the odd-starlike functions. Palestine Journal of Mathematics 2017; 6: 215-221] …

Coefficient bounds for subclasses of bi-univalent functions defined by fractional derivative
operator Page 1 Coefficient bounds for subclasses of bi-univalent functions defined by …