A la Fock-Goncharov coordinates for PU(2,1)

Details A la Fock-Goncharov coordinates for PU(2,1) A la Fock-Goncharov coordinates for PU(2,1)

2007-10-17

arxiv.org/abs/0710.3327v1

Mathematics

Differential Geometry

23 pages, 2 figures

Scientific paper

We describe a set of coordinates on the PU(2,1)-representation variety of the fundamental group of an oriented punctured surface $S$ with negative Euler characteristic. The main technical tool we use is a set of geometric invariants of a triple of flags in the complex hyperpolic plane. We establish a bijection between a set of decorations of an ideal triangulation of $S$ and a subset of the PU(2,1)-representation variety of $\pi_1(S)$.

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