International Journal of Mathematics and Mathematical Sciences (Jan 2018)
Extension of Kirk-Saliga Fixed Point Theorem in a Metric Space with a Reflexive Digraph
Abstract
We extend the result of Kirk-Saliga and we generalize Alfuraidan and Khamsi theorem for reflexive graphs. As a consequence, we obtain the ordered version of Caristi’s fixed point theorem. Some concrete examples are given to support the obtained results.