Sharp Bounds for the Second Hankel Determinant of Logarithmic Coefficients for Strongly Starlike and Strongly Convex Functions
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DOI: 10.3390/axioms11080369
Abstract: 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 logarithmic coefficients of f can transfer to… read more here.
Keywords: logarithmic coefficients; bounds second; hankel determinant; sharp bounds ... See more keywords
Logarithmic Coefficients for Some Classes Defined by Subordination
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DOI: 10.3390/axioms12040332
Abstract: In this paper, we obtain the sharp and accurate bounds for the logarithmic coefficients of some subclasses of analytic functions defined and studied in earlier works. Furthermore, we obtain the bounds of the second Hankel… read more here.
Keywords: classes defined; coefficients classes; logarithmic coefficients; defined subordination ... See more keywords
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