Fixed points for generalized nonexpansive mappings in R-trees
We prove the existence of a fixed point for multivalued generalized nonexpansive mappings in an R-tree. In the case where these mappings commute with a quasi-nonexpansive mapping, we also prove existence of a common fixed point. (C) 2011 Elsevier Ltd. All rights reserved.
fixed point generalized nonexpansive mapping r-tree multivalued mapping