Doubly transitive lines II: Almost simple symmetries

05/15/2019

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by   Joseph W. Iverson, et al.

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We study lines through the origin of finite-dimensional complex vector spaces that enjoy a doubly transitive automorphism group. This paper, the second in a series, classifies those lines that exhibit almost simple symmetries. To perform this classification, we introduce a general recipe involving Schur covers to recover doubly transitive lines from their automorphism group.