Isometries in Riesz groups
Milan Jasem (1986)
Czechoslovak Mathematical Journal
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Milan Jasem (1986)
Czechoslovak Mathematical Journal
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Sylvia Pulmannová (2001)
Commentationes Mathematicae Universitatis Carolinae
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It is shown that divisible effect algebras are in one-to-one correspondence with unit intervals in partially ordered rational vector spaces.
Ramiro H. Lafuente-Rodríguez (2007)
Czechoslovak Mathematical Journal
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We study solvability of equations of the form in the groups of order automorphisms of archimedean-complete totally ordered groups of rank 2. We determine exactly which automorphisms of the unique abelian such group have square roots, and we describe all automorphisms of the general ones.