Let X be a strictly convex complex Banach space, B be its unit ball and f: B→B be F-differentiable, if f(0)=0, then f has the same fixed point set with Dr(0) in B. In particular, the fixed point set for f is ffine.
文摘Let X be a strictly convex complex Banach space, B be its unit ball and f: B→B be F-differentiable, if f(0)=0, then f has the same fixed point set with Dr(0) in B. In particular, the fixed point set for f is ffine.