First-order theories of subgroups of divisible Hahn products

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Abstract

(All the ℓ-groups we consider are Abelian.) Some first-order theories of divisible ℓ-groups are well known, for example the theory of the totally ordered ones and the theories of the projectable ones (in: A.M.W. Glass, W.C. Holland (Eds.), Lattice-ordered Groups, Kluwer Academic Press, Dordrecht, 1989, pp. 41-79). In this paper we study some theories of nonprojectable divisible ℓ-groups, the simplest example of which is R×→ (R × R) (the lexicographic product of R by the direct product R × R). We introduce a generalization of the projectability property (r-projectability). We prove that the class of r-projectable special-valued divisible ℓ-groups is an elementary class and give a classification of its completions. © 2003 Elsevier Science B.V. All rights reserved.

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APA

Lucas, F. (2003). First-order theories of subgroups of divisible Hahn products. Annals of Pure and Applied Logic, 121(2–3), 261–279. https://doi.org/10.1016/S0168-0072(02)00115-X

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