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arXiv 0812.0027math.GR
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经典子群定理的圈积方法

A Wreath Product Approach to Classical Subgroup Theorems

Luis Ribes, Benjamin Steinberg

摘要:

利用圈积给出了Nielsen-Schreier定理和Kurosh子群定理的初等证明。我们的证明是图解性质和工作同时在抽象和profinite类别。给出了拟自由投射有限群的开子群是拟自由的一个新的证明。

英文摘要:

We provide elementary proofs of the Nielsen-Schreier Theorem and the Kurosh Subgroup Theorem via wreath products. Our proofs are diagrammatic in nature and work simultaneously in the abstract and profinite categories. A new proof that open subgroups of quasifree profinite groups are quasifree is also given.

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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