Institute of Mathematics, Maria Curie-Skłodowska University, 20-031, Lublin, Poland
Bibliografia
[1] Bolibok K., Minimal Displacement and Retraction Problem for Balls in Banach Spaces, PhD thesis, Uniwersytet Marii Curie-Skłodowskiej, Lublin, 1999 (in Polish)
[2] Goebel K., On the minimal displacement of points under lipschitzian mappings, Pacific J. Math., 1973, 45, 151–163
[3] Goebel K., Kirk W.A., Topics in Metric Fixed Point Theory, Cambridge Stud. Adv. Math, 28, Cambridge University Press, Cambridge, 1990 http://dx.doi.org/10.1017/CBO9780511526152[Crossref]
[4] Piasecki Ł., Retracting a ball onto a sphere in some Banach spaces, Nonlinear Anal., 2011, 74(2), 396–399 http://dx.doi.org/10.1016/j.na.2010.08.050[Crossref][WoS]