New classes of analytic and bi-univalent functions

Abstract

Using the (p, q)-derivative operator we introduce new subclasses of analytic and bi-univalent functions, we obtain estimates on coefficients and the Fekete-Szegö functional.

Keywords

• fekete-szegö problem
• (p
• q)-derivative operator
• univalent functions
• bi-univalent functions
• analytic functions
• coefficient bounds and coefficient estimates