TRIPLE FIXED POINT THEOREMS FOR WEAK (psi-phi)-CONTRACTIONS
The notion of coupled fixed point is introduced in by Bhaskar and Lakshmikantham in [2]. Very recently, the concept of the tripled fixed point is introduced by Berinde and Borcut [1]. They also proved some triple fixed point theorems. In this manuscript, by using the weak (psi - phi)-contraction, the results of Berinde and Borcut [1] are generalized.
triple fixed point fixed point theorems weak (psi - phi)-contraction partially ordered