
The following interesting theorem, extending several earlier known results, is proved. Let S and T be commuting self-maps of the complete metric space (X,d) satisfying the inequality \[ d(Sx,Ty)\leq c \max \{d(x,y),d(x,Sx),d(y,Ty),d(x,Ty),d(y,Sx\quad)\} \] for all x,y\(\in X\), where \(0
Fixed-point and coincidence theorems (topological aspects), complete metric space, common fixed point
Fixed-point and coincidence theorems (topological aspects), complete metric space, common fixed point
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