Yazar "Yalçın, Sibel" için listeleme
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Generalized Hankel determinant for a general subclass of univalent functions
Yalçın, Sibel; Altınkaya, Şahsene; Owa, Shigeyoshi (Işık University Press, 2018)Making use of the generalized Hankel determinant, in this work, we consider a general subclass of univalent functions. Moreover, upper bounds are obtained for |a3 ? µa2 2|, where µ ? R. -
Introducing a novel subclass of harmonic functions with close-to-convex properties
Çakmak, Serkan; Yalçın, Sibel (Işık University Press, 2025-09-01)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. ... -
On the Chebyshev polynomial coefficient problem of bi-Bazilevi? functions
Altınkaya, Şahsene; Yalçın, Sibel (Işık University Press, 2020)A function said to be bi-Bazilevi? in the open unit disk U if both the function and its inverse are Bazilevi? there. In this paper, we will study a newly constructed class of bi-Bazilevi? functions. Furthermore, we establish ...
