2019
DOI: 10.1016/j.jmp.2019.01.002
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Interval orders, semiorders and ordered groups

Abstract: We prove that the order of an ordered group is an interval order if and only if it is a semiorder. Next, we prove that every semiorder is isomorphic to a collection J of intervals of some totally ordered abelian group, these intervals being of the form [x, x + α[ for some positive α. We describe ordered groups such that the ordering is a semiorder and we introduce threshold groups generalizing totally ordered groups. We show that the free group on finitely many generators and the Thompson group F can be equipp… Show more

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Cited by 2 publications
(1 citation statement)
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“…Zapata et al [43] extended the ordering of Allen's algebra to intervals in an arbitrary partially ordered set. Pouzet and Zaguia [44] described ordered groups such that the ordering is a semiorder, and they introduced threshold groups generalizing totally ordered groups. Ghosh et al [45] introduced and analyzed the concepts of fixed ordering structure and variable ordering structure on intervals.…”
Section: Introductionmentioning
confidence: 99%
“…Zapata et al [43] extended the ordering of Allen's algebra to intervals in an arbitrary partially ordered set. Pouzet and Zaguia [44] described ordered groups such that the ordering is a semiorder, and they introduced threshold groups generalizing totally ordered groups. Ghosh et al [45] introduced and analyzed the concepts of fixed ordering structure and variable ordering structure on intervals.…”
Section: Introductionmentioning
confidence: 99%