Coincidence and fixed point theorems for generalized (ψ,φ)(ψ,φ)-weak nonlinear contraction in ordered KK-metric spaces

In this paper, we establish coincidence and fixed point theorems for a pair of mappings satisfying a new generalized (ψ,φ)(ψ,φ)-weak nonlinear contraction type condition in ordered KK-metric spaces. The presented results generalize and extend the very recent results of Choudhury and Metiya [B.S. Choudhury and N. Metiya, The point of coincidence and common fixed point for a pair of mappings in cone metric spaces, Computers and Mathematics with Applications, 60 (2010) 1686–1695].