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arXiv 1005.3756math.GRmath.RT
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共轭类的乘积与不动点空间

Products of conjugacy classes and fixed point spaces

Robert Guralnick, Gunter Malle

摘要:

本文证明了有限单群中共轭类乘积的几个结果。第一个结果是,总是存在一致生成三元组。这一结果和其他想法被用来解决1966年彼得诺依曼猜想的存在元素在一个不可约的线性群与小固定空间。证明了有限非交换单群中总存在两个共轭类,其乘积包含群的所有非平凡元素。我们用它来证明,在一个非阿贝尔有限单群中的每个元素都可以写成两个r次方的乘积,对于任何素数幂r(特别是两个平方的乘积)。

英文摘要:

We prove several results on products of conjugacy classes in finite simple groups. The first result is that there always exists a uniform generating triple. This result and other ideas are used to solve a 1966 conjecture of Peter Neumann about the existence of elements in an irreducible linear group with small fixed space. We also show that there always exist two conjugacy classes in a finite non-abelian simple group whose product contains every nontrivial element of the group. We use this to show that every element in a non-abelian finite simple group can be written as a product of two rth powers for any prime power r (in particular, a product of two squares).

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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