科研之友
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摘要
We give a lattice theoretic proof of the well-known result that a finite group G is cyclic iff G has at most one subgroup of each order dividing vertical bar G vertical bar. Consequently, we show that a division ring D is a field iff D has at most one maximal subfield.
- 出版日期2017-5
- 单位北京航空航天大学
