In this paper, we introduce several new subclasses of the class of m-fold symmetric bi-univalent
functions and obtain estimates of the Taylor-Maclaurin coefficients| am+ 1|,| a2m+ 1| and …

In this paper our aim is to study some valuable problems dealing with newly defined subclass
of multivalent q-starlike functions. These problems include the initial coefficient estimates, …

Let S s * be the class of normalized functions f defined in the open unit disk D = { z : | z | < 1 }
such that the quantity z f ′ ( z ) f ( z ) lies in an eight-shaped region in the right-half plane …

Let S l * denote the class of analytic functions f in the open unit disk D = { z : | z | < 1 } normalized
by f ( 0 ) = f ′ ( 0 ) − 1 = 0 , which is subordinate to exponential function, z f ′ ( z ) f ( z ) …

… Correspondence should be addressed to Huo Tang; thth2009@163.com … Copyright ©
2021 Hai-Yan Zhang and Huo Tang. This is an open access article distributed under the …

In this paper we define and consider some familiar subsets of analytic functions associated
with sine functions in the region of unit disk on the complex plane. For these classes our aim …

This paper introduces a new integral operator in q-analog for multivalent functions. Using as
an application of this operator, we study a novel class of multivalent functions and define …

In this paper, we introduce and investigate two new subclasses H σ μ ( λ , φ ) and M σ γ ( λ ,
μ , φ ) of Ma-Minda bi-univalent functions defined by using subordination in the open unit …

There are many articles in the literature dealing with the first-order and the second-order
differential subordination and differential superordination problems for analytic functions in the …

There are many articles in the literature dealing with the first‐order and the second‐order
differential subordination and superordination problems for analytic functions in the unit disk, …