In this article, by employing the hyperbolic tangent function tanh z, a subfamily S tanh∗
S_\tanh^∗ of starlike functions in the open unit disk D⊂ CD⊂C: D= z: z∈ C and| z|< 1 …

In the present paper, we obtain the estimates for the first two initial Taylor-Maclaurin
coefficients and for the upper bounds of the Fekete-Szegö functional for new subclasses of …

The logarithmic functions have been used in a verity of areas of mathematics and other
sciences. As far as we know, no one has used the coefficients of logarithmic functions to …

The main object of this article is to present the sharp bounds of the third-order Hankel
determinant for functions in a subclass of normalized analytic functions in the open unit disk …

In this article we define a class of starlike functions with respect to symmetric points in the
domain of sine function. Also, we investigate coefficients bounds and upper bounds for the …

In this study, by making the use of q-analogous of the hyperbolic tangent function and a
Sălăgean q-differential operator, a new class of q-starlike functions is introduced. The prime …

The aim of this paper is to determine sharp bound for the second Hankel determinant of
logarithmic coefficients H 2, 1 (F f/2) of strongly Ozaki close-to-convex functions in the open …

In this paper, we use q-derivative operator to define a new subclass of starlike functions
related with the lemniscate of Bernoulli. For this function class we obtain upper bound of the …

The logarithmic coefficients are very essential in the problems of univalent functions theory.
The importance of the logarithmic coefficients is due to the fact that the bounds on …

This study introduces a subclass S qs* of starlike functions associated with the q-analogue
of the sine function defined in symmetric unit disk. This article comprises the investigation of …