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This article is cited in 5 scientific papers (total in 5 papers)
A sufficient condition for nonpresentability of structures in hereditarily finite superstructures
A. S. Morozovab a Sobolev Institute of Mathematics, pr. Akad. Koptyuga 4, Novosibirsk, 630090 Russia
b Novosibirsk State University, ul. Pirogova 2, Novosibirsk, 630090 Russia
Abstract:
We introduce a class of existentially Steinitz structures containing, in particular, the fields of real and complex numbers. A general result is proved which implies that if $\mathfrak M$ is an existentially Steinitz structure then the following structures cannot be embedded in any structure $\Sigma$-presentable with trivial equivalence over $\mathbb{HF}(\mathfrak M)$: the Boolean algebra of all subsets of $\omega$, its factor modulo the ideal consisting of finite sets, the group of all permutations on $\omega$, its factor modulo the subgroup of all finitary permutations, the semigroup of all mappings from $\omega$ to $\omega$, the lattice of all open sets of real numbers, the lattice of all closed sets of real numbers, the group of all permutations of $\mathbb R$ $\Sigma$-definable with parameters over $\mathbb{HF(R)}$, and the semigroup of such mappings from $\mathbb R$ to $\mathbb R$.
Keywords:
existentially Steinitz structure, hereditarily finite superstructure, $\Sigma$-presentability.
Received: 09.10.2014 Revised: 09.10.2015
Citation:
A. S. Morozov, “A sufficient condition for nonpresentability of structures in hereditarily finite superstructures”, Algebra Logika, 55:3 (2016), 366–379; Algebra and Logic, 55:3 (2016), 242–251
Linking options:
https://www.mathnet.ru/eng/al746 https://www.mathnet.ru/eng/al/v55/i3/p366
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Abstract page: | 328 | Full-text PDF : | 32 | References: | 48 | First page: | 18 |
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