International Journal of Mathematics and Mathematical Sciences
Volume 2011 (2011), Article ID 342895, 7 pages
Research Article

Stability of Admissible Functions

School of Mathematical Sciences, Faculty of Sciences and Technology, UKM, 43600 Bangi, Malaysia

Received 2 June 2011; Accepted 16 July 2011

Academic Editor: Nak Cho

Copyright © 2011 Rabha W. Ibrahim. 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.


By using the concept of the weak subordination, we examine the stability (a class of analytic functions in the unit disk is said to be stable if it is closed under weak subordination) for a class of admissible functions in complex Banach spaces. The stability of analytic functions in the following classes is discussed: Bloch class, little Bloch class, hyperbolic little Bloch class, extend Bloch class ( 𝑄 𝑝 ) , and Hilbert Hardy class ( 𝐻 2 ) .