Decompositions of locally compact contraction groups, series and extensions
Decompositions of locally compact contraction groups, series and extensions
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局部紧收缩群、级数和扩张的分解
DOI:
10.1016/j.jalgebra.2020.11.007
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发表时间:
2021
影响因子:
0.9
通讯作者:
G. A. Willis
中科院分区:
文献类型:
--
作者:
Glöckner;G. A. Willis
A locally compact contraction group is a pair (G, α), where G is a locally compact group and α: G→ G an automorphism such that α n (x)→ e pointwise as n→∞. We show that every surjective, continuous, equivariant homomorphism between locally compact contraction groups admits an equivariant continuous global section. As a consequence, extensions of locally compact contraction groups with abelian kernel can be described by continuous equivariant cohomology. For each prime number p, we use 2-cocycles to construct uncountably many pairwise non-isomorphic totally disconnected, locally compact contraction groups (G, α) which are central extensions {0}→ F p ((t))→ G→ F p ((t))→{0} of the additive group of the field of formal Laurent series over F p= Z/p Z by itself. By contrast, there are only countably many locally compact contraction groups (up to isomorphism) which are torsion groups and abelian, as follows from a classification of the abelian locally compact contraction groups.
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影响因子:
0.7
作者:
Helge Glöckner;G. Willis
通讯作者:
G. Willis
DOI:
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发表时间:
1984
期刊:
影响因子:
--
作者:
John S. P. Wang
通讯作者:
John S. P. Wang
DOI:
10.4171/016
发表时间:
2006
期刊:
Groups, Geometry, and Dynamics
影响因子:
--
作者:
M. Stroppel
通讯作者:
M. Stroppel
DOI:
10.1090/conm/705
发表时间:
2017-06
期刊:
A Tour of Representation Theory
影响因子:
--
作者:
Ryan Kinser
通讯作者:
Ryan Kinser
DOI:
--
发表时间:
1986
期刊:
影响因子:
--
作者:
E. Siebert
通讯作者:
E. Siebert