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On Wigner's theorem: Remarks, complements, comments, and corollaries

✍ Scribed by Jürg Rätz

Publisher
Springer
Year
1996
Tongue
English
Weight
494 KB
Volume
52
Category
Article
ISSN
0001-9054

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Without assumptions on the continuity and the subadditivity of η, by means of Caristi's fixed point theorem, we investigated the existence of fixed points for a Caristi type mapping which partially answered Kirk's problem and improved Caristi's fixed point theorem, Jachymski's fixed point theorem an