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Ideal Triangle Groups, Dented Tori, and Numerical Analysis
2001
Annals of Mathematics
We prove the Goldman-Parker Conjecture: A complex hyperbolic ideal triangle group is discretely embedded in P U (2, 1) if and only if the product of its three standard generators is not elliptic. We also prove that such a group is indiscrete if the product of its three standard generators is elliptic. A novel feature of this paper is that it uses a rigorous computer assisted proof to deal with difficult geometric estimates.
doi:10.2307/2661362
fatcat:goqmlk5mgnbqlfmvrlqx7weauq