Non-arithmetic lattices and the Klein quartic
Abstract
We give an algebro-geometric construction of some of the non-arithmetic ball quotients constructed by the author, Parker and Paupert. The new construction reveals a relationship between the corresponding orbifold fundamental groups and the automorphism group of the Klein quartic, and also with groups constructed by Barthel-Hirzebruch-H\"ofer and Couwenberg-Heckman-Looijenga.
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