Ishikawa Iteration of Coupled Fixed Points for Nonexpansive Mapping and Element of the Best Approximation
Liao Zheng-qi · Journal of Chongqing Jiaotong University · 2007
In strictly convex Banach space,there is set F(T) of coupled fixed points of T for nonexpansive mapping,and it is a closed convex set.When the F(T) becomes the closed linear subspace of the Hilbert space,the relationship of the elements of best approximation between the limit element and initial element of Ishikawa iteration is put forward.