MODIFIED S-ITERATION PROCESS FOR TWO ASYMPTOTICALLY QUASI-NONEXPANSIVE MAPPINGS IN A CAT(0) SPACE.

In this paper, we study a modified S-iteration process involving two asymptotically quasi-nonexpansive mappings. We prove that the sequence generated by this process converges to a common fixed point of the above mentioned mappings. A sufficient condition for convergence to common fixed points has also been given. Our results extend and improve many known results from the existing literature. [ABSTRACT FROM AUTHOR]