Ahmadullah, Md; Imdad, Mohammad; Arif, Mohammad(Universitat Politècnica de València, 2018-04-02)
[EN] In this paper, we prove coincidence and common fixed points results under nonlinear contractions on a metric space equipped with an arbitrary binary relation. Our results extend, generalize, modify and unify several ...
Gutev, Valentin; Nogura, Tsugunori(Universitat Politècnica de València, 2004-04-01)
[EN] The theory of hyperspaces has attracted the attention of many mathematicians who have found a large variety of its applications during the last decades. The theory has taken also its natural course and has yielded ...