Halforders and automorphisms of chain structures (Q5954162)

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scientific article; zbMATH DE number 1698612
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Halforders and automorphisms of chain structures
scientific article; zbMATH DE number 1698612

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    Halforders and automorphisms of chain structures (English)
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    15 October 2002
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    The authors consider a nonempty set \(E\) and introduce the concepts of halfordered set, halfordered permutation set, and halfordered chain structure. These are generalizations of the concepts ``order'' and ``half-order'' in geometry introduced by \textit{E. Sperner} [Math. Ann. 121, 107-130 (1949; Zbl 0032.17801)]. These concepts are then studied by means of their automorphism groups.
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    halfordered set
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    halfordered permutation set
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    halfordered chain structure
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    automorphism groups
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