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Common fixed points for noncontinuous nonself maps on nonmetric spaces. (English) Zbl 0928.54043
Summary: Common fixed-point theorems for sets of two to four noncontinuous maps of a subset \(D\) of a semimetric space \(X\) into \(X\) are proven. The role of weakly biased and weakly compatible maps in securing common fixed points in highlighted.

MSC:
54H25 Fixed-point and coincidence theorems (topological aspects)
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