arXiv subjects
Publications and source records attributed to Serkan Çakmak.
In this paper, we introduce a new subclass of close-to-convex harmonic functions. We present a sufficient coefficient condition for a function to be a member of this class. Furthermore, we establish a distortion theorem. These results lay the groundwork for extending the findings to function classes involving higher-order derivatives.
In this paper, we introduce a new subclass of harmonic functions $f=s+\overline{t}$ in the open unit disk $U =\left \{ z\in C:\left \vert z\right \vert <1\right \} $ satisfying ${\text{Re}}\left[ γs^{\prime }(z)+δzs^{\prime \prime }(z)+\left( \frac{δ-γ}{2}\right) z^{2}s^{\prime \prime \prime }\left( z\right) -λ\right] >\left \vert γt^{\prime }(z)+δzt^{\prime \prime }(z)+\left( \frac{δ-γ}{2}\right) z^{2}t ^{\prime \prime \prime }\left( z\right) \right \vert,$ where $0\leq λ<γ\leq δ, z\in U.$ We determine several properties of this class such as close-to-convexity, coefficient bounds, and growth estimates. We also prove that this class is closed under convex combination and convolution of its members. Furthermore, we investigate the properties of fully starlikeness and fully convexity of the class.
In the present paper, we investigate connections between various subclasses of harmonic univalent functions by using a convolution operator involving the Pascal distribution series.