Antimorphisms of partially ordered sets
Milan R. Tasković (1989)
Archivum Mathematicum
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Milan R. Tasković (1989)
Archivum Mathematicum
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Jianhua Chen, Xianjiu Huang (2015)
Open Mathematics
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In this paper, we introduce a new concept of (α, φ)g-contractive type mappings and establish coupled coincidence and coupled common fixed point theorems for such mappings in partially ordered G-metric spaces. The results on fixed point theorems are generalizations of some existing results.We also give some examples to illustrate the usability of the obtained results.
Dacic, Rade M. (1981)
Publications de l'Institut Mathématique. Nouvelle Série
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S. Todorcevic (1978)
Publications de l'Institut Mathématique [Elektronische Ressource]
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Milan R. Tasković (1980)
Publications de l'Institut Mathématique
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Daniel Hort, Jan Chvalina, Jiří Moučka (2002)
Czechoslovak Mathematical Journal
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We characterize totally ordered sets within the class of all ordered sets containing at least three-element chains using a simple relationship between their isotone transformations and the so called 2-, 3-, 4-endomorphisms which are introduced in the paper. Another characterization of totally ordered sets within the class of ordered sets of a locally finite height with at least four-element chains in terms of the regular semigroup theory is also given.