Coefficient estimates for two subclasses of analytic and bi-univalent functions

• Дата: 2018
• Автори: Lashin, A. Y., Лашин, А. Ю.
• Формат: Стаття
• Мова: Англійська
• Опубліковано: Institute of Mathematics, NAS of Ukraine 2018
• Онлайн доступ: https://umj.imath.kiev.ua/index.php/umj/article/view/1635
• Назва журналу: Ukrains’kyi Matematychnyi Zhurnal

We introduce two new subclasses of the class $\sigma$ of analytic and bi-univalent functions in the open unit disk $U$. Furthermore, we obtain the estimates for the first two Taylor – Maclaurin coefficients $|a_2|$ and $|a_3|$ for the functions from these new subclasses.