Afshari, Hojjat; Shojaat, Hadi; Fulga, Andreea(Universitat Politècnica de València, 2022-04-01)
[EN] Recently Zhu and Zhai studied the concepts of cone b-norm and cone b-Banach space as generalizations of cone b-metric spaces and theygave a definition of φ-operator and obtained some new fixed point theorems in cone ...