Document Type : Research Paper
1 Department of Mathematics, College of Education for Girls, University of Kufa, Najaf, Iraq
2 Department of Mathematics, College of Science, University of Al-Qadisiyah, Diwaniyah, Iraq
In the present paper, we introduce two new subclasses of the function class $\sum$ of bi-univalent functions defined in the open unit disc $U$. Furthermore, we find estimates on the coefficients $|a_2|$ and $|a_3|$ for functions in these new subclasses.