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Fixed point theorems for weak contraction in partially ordered G-metric space

In this article, we present some fixed point theorems in partially ordered G-metric space using the concept of $(ψ,ϕ)$- weak contraction which extend many existing fixed point theorems in such space. We also give some examples to show that if we transform a metric space into a G-metric space our results are not equivalent to the existing results in metric space.