Hankel determinants for starlike and convex functions associated with sigmoid functions Skip
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A starlike function f is characterized by the quantity zf'(z)/f (z) zf′(z)/f (z) lying in the right half-
plane. This paper deals with sharp bounds for certain Toeplitz determinants whose entries …

One of the challenging tasks in the study of function theory is how to obtain sharp estimates
of coefficients that appear in the Taylor–Maclaurin series of analytic univalent functions, and …

Sharp Bounds on Hermitian Toeplitz Determinants for Sakaguchi Classes | SpringerLink
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We determine the necessary and sufficient convolution conditions for the starlike functions
on the open unit disk and related to some geometric aspects of the function $\tanh z $. We …

In this article, we define and discuss some new subclasses of bi-univalent functions
associated with Fibonacci numbers and shell-like curves. We estimate the first two Taylor …

Hermitian–Toeplitz determinants for certain univalent functions | Analysis and Mathematical
Physics Skip to main content SpringerLink Account Menu Find a journal Publish with us Track …

In this paper, we determine the sharp estimates for Toeplitz determinants of a subclass of
close-to-convex harmonic mappings. Moreover, we obtain an improved version of Bohr's …

Following the trend of coefficient bound problems in Geometric Function Theory, in the
present paper, we obtain the sharp bound of $| H_3 (1)| $ for the class $\mathcal {S}^* $, of …

Fekete-Szego inequality for Sakaguchi type of functions in Petal shaped domain Page 1 Aust.
J. Math. Anal. Appl. Vol. 19 (2022), No. 2, Art. 3, 8 pp. AJMAA FEKETE-SZEGÖ INEQUALITY …