Universal deformation rings, endo-trivial modules, and semidihedral and generalized quaternion 2-groups
Universal deformation rings, endo-trivial modules, and semidihedral and generalized quaternion 2-groups
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通用变形环、内平凡模以及半二面体和广义四元数 2 组
DOI:
10.1016/j.jpaa.2018.08.006
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发表时间:
2019
影响因子:
0.8
通讯作者:
Soto, Roberto C.
中科院分区:
文献类型:
--
作者:
Bleher, Frauke M.;Chinburg, Ted;Soto, Roberto C.
Let k be a field of characteristic p> 0, and let W be a complete discrete valuation ring of characteristic 0 that has k as its residue field. Suppose G is a finite group and G ab, p is its maximal abelian p-quotient group. We prove that every endo-trivial kG-module V has a universal deformation ring that is isomorphic to the group ring W G ab, p. In particular, this gives a positive answer to a question raised by Bleher and Chinburg for all endo-trivial modules. Moreover, we show that the universal deformation of V over W G ab, p is uniquely determined by any lift of V over W. In the case when p= 2 and G is a 2-group that is either semidihedral or (generalized) quaternion, we give an explicit description of the universal deformation of every indecomposable endo-trivial kG-module V.
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DOI:
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发表时间:
2004
期刊:
影响因子:
--
作者:
J. Carlson;J. Thévenaz
通讯作者:
J. Thévenaz
DOI:
--
发表时间:
2015
期刊:
影响因子:
--
作者:
Roberto C. Soto
通讯作者:
Roberto C. Soto
DOI:
--
发表时间:
2002
期刊:
影响因子:
--
作者:
F. Bleher
通讯作者:
F. Bleher
影响因子:
4.9
作者:
E. Dade
通讯作者:
E. Dade
DOI:
10.1090/pspum/037/604606
发表时间:
1993-09
期刊:
--
影响因子:
--
作者:
J. Alperin
通讯作者:
J. Alperin