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arXiv 2202.03500math.LO
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完善无电子PAC字段的措施

Measures on perfect e-free PAC fields

Zoé Chatzidakis, Nicholas Ramsey

摘要:

我们构造了$e$ -free完备PAC域上可定义集上的测度,以及构造了绝对伽罗瓦群为有限秩自由亲$p$的完备PAC域上的测度.我们推出的可定义的顺从性的所有群体定义在这样的领域。作为推论,我们还证明了在完全无$ω$的PAC域中,所有可定义群的可定义顺从性。

英文摘要:

We construct measures on definable sets in $e$-free perfect PAC fields, as well as on perfect PAC fields whose absolute Galois groups are free pro-$p$ of finite rank. We deduce the definable amenability of all groups definable in such fields. As a corollary, we additionally prove the definable amenability of all groups definable in perfect $ω$-free PAC fields via ultralimit measures.

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