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Zbl 1180.54057
Kikkawa, Misako; Suzuki, Tomonari
Some notes on fixed point theorems with constants. (English)
[J] Bull. Kyushu Inst. Technol., Pure Appl. Math. 56, 11-18 (2009). ISSN 1343-8670

The authors extend a result of the second author to the case of multi-valued mappings in metric spaces. They also give a simpler proof of Jungck's theorem and make an application to nonexpansive maps in Banach spaces.
[Vassil Angelov (Sofia)]
MSC 2000:
*54H25 Fixed-point theorems in topological spaces
47H20 Semigroups of nonlinear operators

Keywords: fixed point; metric space; generalized contraction

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