External definability and groups in NIP theories
External definability and groups in NIP theories
复制标题
NIP 理论中的外部可定义性和群
DOI:
10.1112/jlms/jdu019
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发表时间:
2014
期刊:
影响因子:
--
通讯作者:
Chernikov A
中科院分区:
文献类型:
--
作者:
Chernikov A
We prove that many properties and invariants of definable groups in NIP theories (i.e. theories without the independence property), such as definable amenability,, etc., are preserved when passing to the theory of the Shelah expansion by externally definable sets,, of a model. In the light of these results, we continue the study of the ‘definable topological dynamics’ of groups intheories. In particular, we prove the Ellis group conjecture relating the Ellis group toin some new cases, including definably amenable groups in-minimal structures.
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DOI:
10.1090/s0002-9947-2012-05626-1
发表时间:
2010
影响因子:
1.3
作者:
E. Hrushovski;A. Pillay;Pierre Simon
通讯作者:
Pierre Simon
DOI:
10.1017/jsl.2014.46
发表时间:
2012
期刊:
The Journal of Symbolic Logic
影响因子:
--
作者:
Pierre Simon
通讯作者:
Pierre Simon
影响因子:
1
作者:
Jakub Gismatullin
通讯作者:
Jakub Gismatullin
影响因子:
2.6
作者:
Pillay A
通讯作者:
Pillay A
DOI:
--
发表时间:
2012
期刊:
影响因子:
--
作者:
Pierre Simon
通讯作者:
Pierre Simon