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math.GT2013
Complex hyperbolic free groups with many parabolic elements
John R. Parker, Pierre Will
We consider in this work representations of the of the fundamental group of the 3-punctured sphere in such that the boundary loops are mapped to . We…
math.GT2013
Real reflections, commutators and cross-ratios in complex hyperbolic space
Julien Paupert, Pierre Will
We provide a concrete criterion to determine whether or not two given elements of PU(2,1) can be written as products of real reflections, with one reflection in common. As an appli…