您要查找的是不是：
- 标准Borel子群standard Borel groups
- 子midnight
- 标准standard
- 帖子post
- 标准的normal
- 标准西洛子群canonical sylow subgroup
- 阿贝尔子群秩Abelian subgroup rank
- 闭子群closed subgroup
- 挠子群torsion subgroup
- 闭正规子群closed normal subgroup
- 脂余子群principal congruence subgroup
- p子群p-subgroup
- 零子群zero subgroup
- 振子群oscillator group
- 波莱尔子群borel subgroup
- 不连续子群discontinuous subgroup
- CCP子群CCP-subgroup
- 极大紧子群maximal compact subgroup
- 极大挠子群maximal torsion subgroup
- 紧子群compact subgroup
