Pseudofinite structures and simplicity
Pseudofinite structures and simplicity
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伪有限结构和简单性
DOI:
10.1142/s0219061315500026
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发表时间:
2015
影响因子:
0.9
通讯作者:
García D
中科院分区:
文献类型:
--
作者:
García D
We explore a notion ofpseudofinite dimension, introduced by Hrushovski and Wagner, on an infinite ultraproduct of finite structures. Certain conditions on pseudofinite dimension are identified that guarantee simplicity or supersimplicity of the underlying theory, and that a drop in pseudofinite dimension is equivalent to forking. Under a suitable assumption, a measure-theoretic condition is shown to be equivalent to local stability. Many examples are explored, including vector spaces over finite fields viewed as 2-sorted finite structures, and homocyclic groups. Connections are made to products of sets in finite groups, in particular to word maps, and a generalization of Tao's Algebraic Regularity Lemma is noted.
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DOI:
10.1090/s0002-9947-1976-0422281-1
发表时间:
1976-10
影响因子:
1.3
作者:
Catarina I. Kiefe
通讯作者:
Catarina I. Kiefe
DOI:
--
发表时间:
2008
期刊:
影响因子:
--
作者:
E. Hrushovski;F. Wagner
通讯作者:
F. Wagner
DOI:
10.1112/jlms/s2-46.3.385
发表时间:
1992
影响因子:
1.2
作者:
E. Hrushovski
通讯作者:
E. Hrushovski
DOI:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
D. Macpherson;K. Tent
通讯作者:
K. Tent
影响因子:
0.3
作者:
A. Kuzichev
通讯作者:
A. Kuzichev