Assumed Results about Particular Groups
We hope that the reader has some familiarity with elementary homological algebra. We begin with a survey of elementary useful results from group extension theory. Later, we focus on particular extensions which come up in our theory of sporadic groups. For general reference, we suggest [Ben], [Gru], [HiSt], [MacL], [Rot].
KeywordsShort Exact Sequence Central Extension Chevalley Group Covering Group Finite Simple Group
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