Fixed point principles in general b-metric spaces and b-menger probabilistic spaces

Abstract EN

In this work, three general principles for existence a fixed point and a common fixed point are proved in types of general metric spaces, which conclude the existence a fixed point of set valued mapping in a general metric space , the existence of common fixed point of three commuting orbitally continuous condensing mappings and a result of fixed point for set valued condensing mapping defined on probabilistic bounded subset of Menger probabilistic metric space.