Upper Bounds of the Third Hankel Determinant for Close-to-Convex Functions
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DOI: 10.3390/sym14050885
Abstract: In this paper, the third Hankel determinant for the class N of functions convex in one direction is estimated. An analogous problem is solved for a subclass of N consisting of functions with real coefficients.… read more here.
Keywords: upper bounds; third hankel; bounds third; hankel determinant ... See more keywords