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In the area of modern algebra known as group theory, the Janko group ''J1'' is a sporadic simple group of order : 233571119 = 175560 : ≈ 2. ==History== ''J1'' is one of the 26 Sporadic groups and was originally described by Zvonimir Janko in 1965. It is the only Janko group whose existence was proved by Janko himself and was the first sporadic group to be found since the discovery of the Mathieu groups in the 19th century. Its discovery launched the modern theory of sporadic groups. J1 is the smallest of the 6 sporadic groups called the pariahs because they are not subquotients of the monster group. J1 has no outer automorphisms and its Schur multiplier is trivial. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Janko group J1」の詳細全文を読む スポンサード リンク
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