Demonstrates sharp bounds on third Hankel determinants in starlike and convex functions, implying significant improvements.
In this paper, we study Hankel determinants of the coefficients of Taylor series of subclasses of starlike and convex functions. We give sharp bounds for third Hankel determinant of starlike and convex functions associated with Gregory coefficients. Our results improve the results for both classes studied in the literature.
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Srivastava et al. (2026) studied this question.
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