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Abstract
The aim of this paper is to generalize Caristi’s fixed point theorem in a K-complete
quasi-metric space endowed with a reflexive digraph by using Száz maximum principle.
An example is given to support our main result.
[1
]Laboratory of Algebra, Analysis and Applications, Faculty of Sciences Ben M’sik, University
of Hassan II Casablanca, Morocco
[2
]Laboratory of Mathematics and Applications, Faculty of Sciences and Technologies of
Mohammedia, University of Hassan II Casablanca, Morocco
[3
]Laboratory of Mathematical Analysis and Applications (LAMA), Faculty of Sciences Dhar
El Mahraz, University Sidi Mohamed Ben Abdellah, Fes, Morocco