Archiv der Mathematik

, Volume 87, Issue 2, pp 104–112 | Cite as

Infinite groups with large balls of torsion elements and small entropy

  • Laurent Bartholdi
  • Yves de Cornulier
Original Paper


We exhibit infinite, solvable, virtually abelian groups with a fixed number of generators, having arbitrarily large balls consisting of torsion elements. We also provide a sequence of 3-generator non-virtually nilpotent polycyclic groups of algebraic entropy tending to zero. All these examples are obtained by taking appropriate quotients of finitely presented groups mapping onto the first Grigorchuk group.

Mathematics Subject Classification (2000).

Primary 20F50 Secondary 20F16 20F05 


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Copyright information

© Birkhäuser Verlag, Basel 2006

Authors and Affiliations

  1. 1.École Polytechnique Fédérale de Lausanne (EPFL)Institut de Mathématiques B (IMB)LausanneSwitzerland
  2. 2.Institut de MathématiquesUniversité de NeuchâtelNeuchâtelSwitzerland

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