Webb数学上的单群（英语：Simple group）是指没有非平凡正规子群的群。任意一个群如果不是单群，都可以作进一步分解而得到一个非平凡正规子群及对应的商群。这个过程可以一 … WebbThese Regulations make provision for arrangements (“the arrangements”) under which corporation tax group relief may be claimed or surrendered by an authorised company …

Supplement. Finite Simple Groups - East Tennessee State University

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单群_百度百科

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