We study the arithmeticity of the Couwenberg–Heckman–Looijenga lattices in PU(n,1), and show that they contain a nonarithmetic lattice in PU(3,1) which is not commensurable to the nonarithmetic Deligne–Mostow lattice in PU(3,1).
Keywords: complex hyperbolic geometry, nonarithmetic lattices, hyperplane arrangements, complex reflection groups, Artin groups
Deraux, Martin  1
@article{10_2140_agt_2020_20_925,
author = {Deraux, Martin},
title = {A new nonarithmetic lattice in {PU(3,1)}},
journal = {Algebraic and Geometric Topology},
pages = {925--963},
year = {2020},
volume = {20},
number = {2},
doi = {10.2140/agt.2020.20.925},
url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2020.20.925/}
}
Deraux, Martin. A new nonarithmetic lattice in PU(3,1). Algebraic and Geometric Topology, Tome 20 (2020) no. 2, pp. 925-963. doi: 10.2140/agt.2020.20.925
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