對於個數為 2qr 的群 ,q,r 為質數 ,且q<r , 這些群結構的數量 ,可以歸納成兩類 :一類是當 q∤r−1 , 另一類是當 q | r−1 . 所以我將對於這兩類 不同形式的群最分.

The number of groups with order 2qr,where q < r are primes,depends on whether q divides r-1.In this paper,we explore the possible structures of these groups.

1.Introduction....................................1
2.Main Results...................................13
References.......................................33

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