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In this paper we present a survey of related fixed point theorems in different spaces starting from the results of Fisher. It also includes results in set valued and implicit functions. Regarding the spaces we include metric space, uniform space, fuzzy metric space, menger space, symmetric space, partial metric space etc. Further, we prove two related fixed point theorems in three metric spaces by considering three set valued mappings.
Rohen et al. (Sat,) studied this question.
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