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Approximation of Fixed Points of Asymptotically Demicontractive Mappings in Arbitrary Banach Spaces  
 
  Authors: D.I. Igbokwe,  
  Keywords: Asymptotically Demicontractive Maps, Fixed Points, Modified Mann and Ishikawa Iteration Methods with Errors.  
  Date Received: 14/05/01  
  Date Accepted: 17/07/01  
  Subject Codes:

47H06,47H10,47H15,47H17.

 
  Editors: Sever S. Dragomir,  
 
  Abstract:

Let $E$ be a real Banach Space and $K$ a nonempty closed convex (not necessarily bounded) subset of $E$. Iterative methods for the approximation of fixed points of asymptotically demicontractive mappings $T:K rightarrow K$ are constructed using the more general modified Mann and Ishikawa iteration methods with errors.

Our results show that a recent result of Osilike [1] (which is itself a generalization of a theorem of Qihou [2]) can be extended from real q-uniformly smooth Banach spaces, $1  q  infty$, to arbitrary real Banach spaces, and to the more general Modified Mann and Ishikawa iteration methods with errors. Furthermore, the boundedness assumption imposed on the subset $K$ in ([1], [2]) are removed in our present more general result. Moreover, our iteration parameters are independent of any geometric properties of the underlying Banach space.
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