Estimation of the Second-Order Hankel Determinant of Logarithmic Coefficients for Two Subclasses of Starlike Functions
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DOI: 10.3390/sym14102039
Abstract: In our present study, two subclasses of starlike functions which are symmetric about the origin are considered. These two classes are defined with the use of the sigmoid function and the trigonometric function, respectively. We… read more here.
Keywords: two subclasses; logarithmic coefficients; second order; order hankel ... See more keywords
Results on Second-Order Hankel Determinants for Convex Functions with Symmetric Points
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DOI: 10.3390/sym15040939
Abstract: One of the most important problems in the study of geometric function theory is knowing how to obtain the sharp bounds of the coefficients that appear in the Taylor–Maclaurin series of univalent functions. In the… read more here.
Keywords: second order; convex functions; symmetric points; order hankel ... See more keywords