Estimates for analytic functions concerned with Hankel determinant

• Datum: 2021
• 1. Verfasser: Örnek, B. N.
• Format: Artikel
• Sprache: Englisch
• Veröffentlicht: Institute of Mathematics, NAS of Ukraine 2021
• Online Zugang: https://umj.imath.kiev.ua/index.php/umj/article/view/907
• Назва журналу: Ukrains’kyi Matematychnyi Zhurnal

UDC 517.5 We give an upper bound of Hankel determinant of the first order $(H_{2}(1))$ for the classes of an analytic function. In addition, an evaluation with the Hankel determinant from below will be given for the second angular derivative of $f(z)$ analytic function. For new inequalities, the res...