A counterexample to the first Zassenhaus conjecture
A counterexample to the first Zassenhaus conjecture
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第一个扎森豪斯猜想的反例
DOI:
10.1016/j.aim.2018.10.004
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发表时间:
2018
影响因子:
1.7
通讯作者:
Eisele F
中科院分区:
文献类型:
--
作者:
Eisele F
Hans J. Zassenhaus conjectured that for any unit u of finite order in the integral group ring of a finite group G there exists a unit a in the rational group algebra of G such that a− 1⋅ u⋅ a=±g for some g∈ G. We disprove this conjecture by first proving general results that help identify counterexamples and then providing an infinite number of examples where these results apply. Our smallest example is a metabelian group of order 2 7⋅ 3 2⋅ 5⋅ 7 2⋅ 19 2 whose integral group ring contains a unit of order 7⋅ 19 which, in the rational group algebra, is not conjugate to any element of the form±g.
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