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Pariah group
In the area of modern algebra known as group theory, the term pariah was introduced by to refer to the six sporadic simple groups that are not subquotients of the monster group.
The prime 37 divides the order of the Lyons Group ''Ly''. Since 37 does not divide the order of the monster, ''Ly'' cannot be a subquotient of it; thus ''Ly'' is a pariah. For exactly the same reason, ''J''4 is a pariah. Four other sporadic groups were also shown to be pariahs. The complete list is shown below.
==The happy family==
The other 20 sporadic groups, those which ''are'' subquotients of the monster group, are referred to as the ''happy family''.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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