On Landau’s Type Estimates for Coefficients of Univalent Functions
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DOI: 10.1007/s40315-020-00333-w
Abstract: In this article we estimate the sum of coefficients for functions with restrictions on the pre-Schwarzian derivative. We obtain an estimate, which is sharp up to a constant and find upper and lower bounds for… read more here.
Keywords: landau type; coefficients univalent; estimates coefficients; univalent functions ... See more keywords
Estimates for the Coefficients of Subclasses Defined by the Bell Distribution of Bi-Univalent Functions Subordinate to Gegenbauer Polynomials
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DOI: 10.3390/math11081799
Abstract: In the real world there are many applications that find the Bell distribution to be a useful and relevant model. One of these is the normal distribution. In this paper, we develop a new subclass… read more here.
Keywords: univalent functions; gegenbauer polynomials; estimates coefficients; distribution ... See more keywords
Estimates for Coefficients of Bi-Univalent Functions Associated with a Fractional q-Difference Operator
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DOI: 10.3390/sym14050879
Abstract: In the present paper, we discuss a class of bi-univalent analytic functions by applying a principle of differential subordinations and convolutions. We also formulate a class of bi-univalent functions influenced by a definition of a… read more here.
Keywords: univalent functions; coefficients univalent; operator; functions associated ... See more keywords