•  
  •  
 

Turkish Journal of Mathematics

Authors

SARBESWAR BARIK

DOI

10.3906/mat-1908-66

Abstract

In this paper, we introduce two new subclasses of biunivalent functions analytic in the exterior of the unit disc. The bounds obtained for the $zero^{th}$, first and second coefficient improves upon earlier known results. The results are obtained by refining the well-known estimates for the initial coefficients of the Carth$\acute{e}$odory functions.

First Page

98

Last Page

107

Included in

Mathematics Commons

Share

COinS