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More maps for which F(T)=F(Tn)

Jeong G., Rhoades B.

Demonstratio Mathematica

2007

Vol. 40, nr 3

671-680

We continue our investigation of situations in which the fixed point sets for maps and their iterates are the same.

Common fixed point theorems for three expansive self-maps in D-metric spaces

Singh B., Jain S.

Demonstratio Mathematica

2005

Vol. 38, nr 3

703--713

B. Singh and R. K. Sharma [Demonstratio Math. Vol. 36, No.l (2003), 215-220] have proved two common fixed point theorems for two self-maps satisfying an expansive condition in D- metric spaces. This note offers generalization for these theorems for three self-maps using weak- compatibility and reduces the domain of z to an orbit only. The last theorem proves that the continuity of none of two or three maps is required in the setting of D- metric space.