Initial coefficients for a subclass of bi-univalent functions defined by Salagean differential operator

In this paper, we investigate a new subclass n ( ; ;') of analytic and bi-univalent functions in the open unit disk U de…ned by Salagean di¤erential operator.For functions belonging to this class, we obtain estimates on the …rst two Taylor-Maclaurin coe¢ cient ja 2 j and ja 3 j.