In the present paper, authors introduce and investigates two new subclasses and, of class k-fold bi-univalent functions in open unit disk. The initial coefficients for all that belong to them were determined, as well a field determining these requires complicated process. bounds are contained among remaining results our analysis obtained. addition, some specific special improver related classes...

in this paper we introduce and investigate a certain subclass of univalentfunctions which are analytic in the unit disk u.such results as coecientinequalities. the results presented here would provide extensions of those givenin earlier works.

In the present work, we define two new families of analytic and m-fold symmetric biunivalent functions in open unit disk $\Delta$. Also, for each classes introduced here, prove upper bounds initial coefficients $\left|b_{m+1}\right|$ $\left|b_{2 m+1}\right|$. Furthermore, get special cases our results.

Inspired by the recent works of Srivastava et al. (2010), Frasin and Aouf (2011), Caglar (2013), we introduce investigate in present paper two new general subclasses class consisting normalized analytic bi-univalent functions open unit disk U. For belonging to these introduced here, obtain estimates on Taylor-Maclaurin coefficients |a_2| |a_3|. Several connections some earlier known results are...