International Journal of Mathematics and Mathematical Sciences
Volume 24 (2000), Issue 9, Pages 577-581

On the Fekete-Szegö problem

B. A. Frasin and Maslina Darus

School of Mathematical Sciences, Faculty of Sciences and Technology, University Kebangsaan Malaysia, Bangi, Selangor 43600, Malaysia

Received 9 May 2000

Copyright © 2000 B. A. Frasin and Maslina Darus. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Let f(z)=z+a2z2+a3z3+ be an analytic function in the open unit disk. A sharp upper bound is obtained for |a3μa22| by using the classes of strongly starlike functions of order β and type α when μ1.