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Covering Numbers of the Sporadic Simple Groups
作者姓名:王杰
作者单位:Peking University
基金项目:The Project Supported by National Natural Science Foundation of China.
摘    要:Let G be a finite nonabelian simple group. The covering number of G is the sm-allest integer n such that C~n=G for every nontrivial conjugacy class C of G andis denoted by cn(G). The extended covering number of G, denoted by ecn(G), is

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