Una generalizzazione di certe algebre che intervengono nella teoria dei sistemi
Une approche métrique de la rétraction dans les ensembles ordonnés et les graphes
Uniform asymptotic normal structure, the uniform semi-opial property, and fixed points of asymptotically regular uniformly Lipschitzian semigroups. II.
Universal mappings and weakly confluent mappings
Un'osservazione sugli autoomeomorfismi dei cerchi
Urysohn’s lemma, gluing lemma and contraction mapping theorem for fuzzy metric spaces
In this paper the concept of a fuzzy contraction mapping on a fuzzy metric space is introduced and it is proved that every fuzzy contraction mapping on a complete fuzzy metric space has a unique fixed point.
Using implicit relations to prove unified fixed point theorems in metric and 2-metric spaces.