Proceedings of the American Mathematical Society

ISSN 1088-6826(online) ISSN 0002-9939(print)



Rank one lattices whose parabolic isometries have no rotational part

Author: Christoph Hummel
Journal: Proc. Amer. Math. Soc. 126 (1998), 2453-2458
MSC (1991): Primary 53C35; Secondary 22E40, 22E25
MathSciNet review: 1443390
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Abstract: We prove a result on certain finite index subgroups of rank one lattices which is motivated by cusp closing constructions.

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Additional Information

Christoph Hummel
Affiliation: Department of Mathematics, University of Pennsylvania, 209 South $33^{rd}$ Street, Philadelphia, Pennsylvania 19104
Address at time of publication: Departement Mathematik, ETH-Zentrum, CH-8092 Zürich, Switzerland

Keywords: Rank one lattices, rotational part, cusp closing
Received by editor(s): December 7, 1996
Received by editor(s) in revised form: January 22, 1997
Additional Notes: The author is supported by the Swiss National Science Foundation.
Dedicated: (Communicated by Christopher Croke)
Article copyright: © Copyright 1998 American Mathematical Society