Author:
Kalane Sagar B.,Parker John R.
Abstract
AbstractIn this paper we consider a group generated by two unipotent parabolic elements of $$\textrm{SU}(2,1)$$
SU
(
2
,
1
)
with distinct fixed points. We give several conditions that guarantee the group is discrete and free. We also give a result on the diameter of a finite $${\mathbb R}$$
R
-circle in the Heisenberg group.
Publisher
Springer Science and Business Media LLC
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