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arXiv 1401.4880math.LO
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关于n-依赖群与域

On n-dependent groups and fields

Nadja Hempel

摘要:

首先,给出了一个2-依赖群不含指数有界的极小子群的例子。第二,所有的无限n-依赖领域被证明是Artin-Schreier关闭。此外,任何不可分闭PAC域的理论对所有自然数n都具有IPn性质,并且依赖(NIP)值域的某些性质推广到n-依赖情形.

英文摘要:

First, an example of a 2-dependent group without a minimal subgroup of bounded index is given. Second, all infinite n-dependent fields are shown to be Artin-Schreier closed. Furthermore, the theory of any non separably closed PAC field has the IPn property for all natural numbers n and certain properties of dependent (NIP) valued fields extend to the n-dependent context.

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