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On Quadruple fixed point theorems in partially ordered metric spaces

S. H. Rasouli, M. Bahrampour


We introduce the concept of quadruple fixed point for mixed monotone mapping in a complete metric space with partial order and obtain existence, and uniqueness theorems. Our result generalize and extend recent tripled fixed point established by Vasile Berinde and Martin Borcut [3].


Quadruple fixed point; Partially ordered set; Mixed monotone operators; Existence and uniqueness.

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