Fixed points of periodic mappings in Hilbert spaces
Victor Perez Garcia, Helga Fetter Nathansky (2010)
Annales Universitatis Mariae Curie-Sklodowska, sectio A – Mathematica
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In this paper we give new estimates for the Lipschitz constants of n-periodic mappings in Hilbert spaces, in order to assure the existence of fixed points and retractions on the fixed point set.