Shaba, Timilehin GideonAraci, SerkanAdebesin, Babatunde OlufemiUsta, FuatKhan, Bilal2025-10-112025-10-1120242073-8994https://doi.org/10.3390/sym16121640https://hdl.handle.net/20.500.12684/21528This research investigates the second Hankel determinant for a specific class of functions associated with the Daehee polynomial. To achieve this, we introduce new subclasses of starlike functions in the context of Daehee polynomials. In complex analysis, establishing precise bounds for coefficient estimates in bi-univalent functions is essential, as these coefficients define the fundamental properties of conformal mappings. In this study, we derive sharp bounds for coefficient estimates within new subclasses of starlike functions related to Daehee polynomials, with most of the obtained limits demonstrating high accuracy. This work aims to inspire further exploration of rigorous bounds for analytic functions associated with innovative mapping domains.en10.3390/sym16121640info:eu-repo/semantics/openAccessbi-univalent functionsbest extimatesDaehee polynomialHankel determinantstarlike functionsArticle16122-s2.0-85213284426WOS:001387659300001N/AQ2