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Proceedings of the American Mathematical Society
ISSN 1088-6826 (e) ISSN 0002-9939 (p)
     

A finitely presented group with unbounded dead-end depth

Author(s): Sean Cleary; Tim R. Riley
Journal: Proc. Amer. Math. Soc. 134 (2006), 343-349.
MSC (2000): Primary 20F65
Posted: August 12, 2005
Errata: Proc. Amer. Math. Soc. 136 (2008), 2641--2645
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Abstract | References | Similar articles | Additional information

Abstract: The dead-end depth of an element $g$ of a group $G$, with respect to a generating set $\mathcal{A}$, is the distance from $g$ to the complement of the radius $d_{\mathcal{A}}(1,g)$ closed ball, in the word metric $d_{\mathcal{A}}$ defined with respect to $\mathcal{A}$. We exhibit a finitely presented group $G$ with a finite generating set with respect to which there is no upper bound on the dead-end depth of elements.


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Additional Information:

Sean Cleary
Affiliation: Department of Mathematics, The City College of New York, City University of New York, New York, New York 10031
Email: cleary@sci.ccny.cuny.edu

Tim R. Riley
Affiliation: Department of Mathematics, Yale University, 10 Hillhouse Avenue, P.O. Box 208283, New Haven, Connecticut 06520-8283
Address at time of publication: Department of Mathematics, Cornell University, Ithaca, New York 14853-4201
Email: tim.riley@yale.edu

DOI: 10.1090/S0002-9939-05-08043-3
PII: S 0002-9939(05)08043-3
Keywords: Dead-end depth, lamplighter
Received by editor(s): July 26, 2004
Received by editor(s) in revised form: September 18, 2004
Posted: August 12, 2005
Additional Notes: Support for the first author from PSC-CUNY grant \#65752 is gratefully acknowledged.
Support for the second author from NSF grant 0404767 is gratefully acknowledged.
Communicated by: Alexander N. Dranishnikov
Copyright of article: Copyright 2005, American Mathematical Society


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