Quadruple fixed point theorems under (φ,ψ )-contractive conditions in partially ordered G -metric spaces with mixed g -monotone property

Abstract

In this paper, we prove some quadruple coincidence and quadruple fixed point theorems for (ϕ, ψ)-contractive type mappings in partially ordered G-metric spaces with mixed g-monotone property. The results on fixed point theorems are generalizations of some results obtained by Mustafa [Z. Mustafa, Fixed Point Theory Appl., 2012, 22 pages]. We also give an example to support our results.

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