Abstract
In the present article, we introduce two new subclasses of lambda-pseudo biunivalent functions with respect to symmetrical points in the open unit disk U defined by means of the Horadam polynomials. For functions belonging to these subclasses , estimates on the Taylor -Maclaurin coefficients ja2j and ja3j are obtained . Fekete-Szego inequalities of functions belonging to these subclasses are also founded. Furthermore, we point out several new special cases of our results.