A discrete criterion in PU(2,1) by use of elliptic elements

作者:Yang, Shihai*; Fang, Ainong
来源:Proceedings of the Japan Academy Series A-Mathematical Sciences, 2006, 82(3): 46-48.
DOI:10.3792/pjaa.82.46

摘要

In this paper we show a 2-dimensional subgroup in PU(2, 1) which contains elliptics is discrete if and only if all its subgroups generated by two elliptics are discrete. This generalize the well-known discreteness criterion first established by T. Jorgensen.