A new characterization of Mathieu groups
Changguo Shao, Qinhui Jiang (2010)
Archivum Mathematicum
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Let be a finite group and the set of numbers of elements with the same order in . In this paper, we prove that a finite group is isomorphic to , where is one of the Mathieu groups, if and only if the following hold: (1) , (2) .