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Infinite systolic groups are not torsion

Infinite systolic groups are not torsion
Infinite systolic groups are not torsion

We study k-systolic complexes introduced by T. Januszkiewicz and J. Swiatkowski, which are simply connected simplicial complexes of simplicial nonpositive curvature. Using techniques of filling diagrams we prove that for k ≥ 7 the 1-skeleton of a k-systolic complex is Gromov hyperbolic. We give an elementary proof of the so-called Projection Lemma, which implies contractibility of 6-systolic complexes. We also present a new proof of the fact that an infinite group acting geometrically on a 6-systolic complex is not torsion.

Filling diagram, Simplicial nonpositive curvature, Systolic complex
0010-1354
169-194
Prytuła, Tomasz
8540bd1f-b0fd-40e8-b6d8-72c80cb05fdf
Prytuła, Tomasz
8540bd1f-b0fd-40e8-b6d8-72c80cb05fdf

Prytuła, Tomasz (2018) Infinite systolic groups are not torsion. Colloquium Mathematicum, 153 (2), 169-194. (doi:10.4064/cm6982-6-2017).

Record type: Article

Abstract

We study k-systolic complexes introduced by T. Januszkiewicz and J. Swiatkowski, which are simply connected simplicial complexes of simplicial nonpositive curvature. Using techniques of filling diagrams we prove that for k ≥ 7 the 1-skeleton of a k-systolic complex is Gromov hyperbolic. We give an elementary proof of the so-called Projection Lemma, which implies contractibility of 6-systolic complexes. We also present a new proof of the fact that an infinite group acting geometrically on a 6-systolic complex is not torsion.

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More information

e-pub ahead of print date: 30 April 2018
Published date: 2018
Keywords: Filling diagram, Simplicial nonpositive curvature, Systolic complex

Identifiers

Local EPrints ID: 424469
URI: http://eprints.soton.ac.uk/id/eprint/424469
ISSN: 0010-1354
PURE UUID: e2fba75e-9e5c-4be5-abf9-954cd0071342

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Date deposited: 05 Oct 2018 11:37
Last modified: 05 Jun 2024 18:19

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Contributors

Author: Tomasz Prytuła

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