Coefficient estimates for a new subclass of analytic and bi-univalent functions defined by Hadamard product (Q2338820)

Summary: We introduce and investigate a new general subclass \(\mathcal H^{\lambda,\mu}_{\Sigma}(\varphi; \Theta)\) of analytic and bi-univalent functions in the open unit disk \(\mathbb U\). For functions belonging to this class, we obtain estimates on the first two Taylor-Maclaurin coefficients \(| a_2|\) and \(| a_3|\).