STRONG CONVERGENCE OF PATHS FOR NONEXPANSIVE SEMIGROUPS IN BANACH SPACES
Shin Min Kang, Sun Young Cho, Young Chel Kwun · Korean Journal of Mathematics · 2011
Let E be a uniformly convex Banach space with a uniformly Gateaux differentiable norm, C be a nonempty closed convex subset of E and f : $C{\rightarrow}C$ be a fixed bounded continuous strong pseudocontraction with the coefficient ${\alpha}{\in}(0,1)$ . Let $\{{\lambda}_t\}_{0 < t < 1}$ be a net of positive real numbers such that ${\lim}_{t{\rightarrow}0}{\lambda}_t={\infty}$ and S = { $T(s)$ : $0{\leq}s$ < ${\infty}$ } be a nonexpansive semigroup on C such that $F(S){ eq}{\emptyset}$ , where F(S) denotes the set of fixed points of the semigroup. Then sequence { $x_t$ } defined by $x_t=tf(x_t)+(1-t)\frac{1}{{\lambda}_t}{\int_{0}}^{{\lambda}_t}T(s)x{_t}ds$ converges strongly as $t{\rightarrow}0$ to $\bar{x}{\in}F(S)$ , which solves the following variational inequality ${\langle}(f-I)\bar{x},\;p-\bar{x}{\rangle}{\leq}0$ for all $p{\in}F(S)$ .