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arXiv 2208.08293math.LO
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具有通类导子的实封闭的域中的可定义群及相关结构

On definable groups in real closed fields with a generic derivation, and related structures

Ya'acov Peterzil, Anand Pillay, Francoise Point

摘要:

我们研究有限维群定义的模型理论的实封闭的领域与通用的推导(也称为CODF)。我们证明了任何这样的群可定义地嵌入在一个半代数群中。我们的结果扩展到几个更一般的情况下,强大的模型完整的理论大几何领域的通用推导,模型完整的O-最小的扩展RCF的通用推导,开放理论的拓扑领域的通用推导。我们还给出了在几何结构背景下从一般数据恢复可定义群的一般定理。

英文摘要:

We study finite-dimensional groups definable in models of the theory of real closed fields with a generic derivation (also known as CODF). We prove that any such group definably embeds in a semialgebraic group. We extend the results to several more general contexts; strongly model complete theories of large geometric fields with a generic derivation, model complete o-minimal expansions of RCF with a generic derivation, open theories of topological fields with a generic derivation. We also give a general theorem on recovering a definable group from generic data in the context of geometric structures.

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