Coefficient estimates for a general subclass of $m$-fold symmetric bi-univalent functions

A Subclass of Univalent Functions Defined by Ruscheweyh Operator

“…Recently, authors have been interested in studying the m-fold symmetric biunivalent functions class Σ m (see, for example, [4,7,18,26]) and obtaining non-sharp bounds estimates on the first two Taylor-Maclaurin coefficients |a m+1 | and |a 2m+1 |. In this respect, Altinkaya and Yalçin [2] obtained non-sharp estimates on the second Hankel determinant for the subclass H Σm (β) of m-fold symmetric bi-univalent functions class Σ m .…”