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Coupled fixed point theorems with rational type contractive condition via C-class functions and inverse Ck-class functions
The purpose of this paper is to develop coupled fixed point theorems by C-class functions
with mixed monotonicity, discuss the existence of the coupled fixed point of two mappings and obtain
a coupled coincidence point theorem via inverse Ck-class functions in partially ordered H-metric
spaces. This improves the existing results. In addition, some instances and an application are given
to illustrate the usability and validity of the results.