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arXiv 1402.0340math.RA
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所有五度的二面体division algebras都是环状的

All dihedral division algebras of degree five are cyclic

Eliyahu Matzri

摘要:

Rowen和Saltman证明了每个被中心的$2n$度的二面角扩张分裂的除法代数,$n$奇,实际上是循环的。证明要求中心有阶为$n$的单位根。我们表明,对于$n=5$,这个假设可以删除。然后得出${}_{5\!\!\!\:}Br(F)$,Brauer群的$5$ -扭部分,是由循环代数生成的,推广了Merkurjev关于$2$和$3$扭部分的结果.

英文摘要:

Rowen and Saltman proved that every division algebra which is split by a dihedral extension of degree $2n$ of the center, $n$ odd, is in fact cyclic. The proof requires roots of unity of order $n$ in the center. We show that for $n=5$, this assumption can be removed. It then follows that ${}_{5\!\!\!\:}Br(F)$, the $5$-torsion part of the Brauer group, is generated by cyclic algebras, generalizing a result of Merkurjev on the $2$ and $3$ torsion parts.

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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