Just-infinite群
外觀
群論中一個無限群G稱為just-infinite,如果G的所有真商群都是有限群,也就是說所有非平凡正規子群都有有限指數。
例子
[編輯]參考
[編輯]- McCarthy, D., Infinite groups whose proper quotient groups are finite, I (頁面存檔備份,存於互聯網檔案館). Communications on Pure and Applied Mathematics. 1968, 21(6):545–562.
- McCarthy, D., Infinite groups whose proper quotient groups are finite, II (頁面存檔備份,存於互聯網檔案館). Communications on Pure and Applied Mathematics. 1970, 23(5):767–789.