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Andrea Sereni 《Historia Mathematica》2018,45(3):302-304
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We characterize totally ordered sets within the class of all ordered sets containing at least four-element chains. We use a simple relationship between their isotone transformations and the so called 1-endomorphism which is introduced in the paper. Later we describe 1-, 2-, 3-, 4-homomorphisms of ordered sets in the language of super strong mappings. 相似文献
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Ivo Vrkoč 《Applications of Mathematics》2000,45(4):318-319
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