A contractive fixed point free mapping on a weakly compact convex set
Tom 223 / 2014
Studia Mathematica 223 (2014), 275-283
MSC: 47H09, 46E30.
DOI: 10.4064/sm223-3-6
Streszczenie
We prove the existence of a contractive mapping on a weakly compact convex set in a Banach space that is fixed point free. This answers a long-standing open question.