Groups, Automata and Languages, LMS Student Texts, Cambridge University Press, 2017
joint with Derek F. Holt and Sarah Rees
Commensurations and Metric Properties of Houghton's Groups
joint with José Burillo, Sean Cleary and Armando Martino
Pacific Journal of Mathematics 285 vol. 2 (2016), 289--301 DOI: 10.2140/pjm.2016.285.289
Obstructions for subgroups of Thompson's group $V$
joint with José Burillo and Sean Cleary
preprint 2014, accepted for Proceedings of London Mathematical Society - EPSRC Durham 2013 Symposium Geometric and Cohomological Group Theory, to appear in LMS Lecture Notes series 2015
Addendum to ``Commensurations and Subgroups of
Finite Index of Thompson's Group $F$''
joint with José Burillo and Sean Cleary
Geometry & Topology 17 (2013), 1199-1203 DOI: 10.2140/gt.2013.17.1199
A Note on Element Centralizers in Finite Coxeter Groups
joint with Matjaž Konvalinka and
Götz Pfeiffer
J. Group Theory 14 (2011), 727-745
Groups with context-free conjugacy problems
joint with Derek Holt and Sarah Rees
Internat. J. Algebra Comput. 21 (2011), no. 1-2, 193-216
Commensurations and Subgroups of Finite Index of Thompson's Group F
joint with José Burillo and Sean Cleary
Geometry & Topology 12 (2008), no. 3, 1701-1709 DOI: 10.2140/gt.2008.12.1701
On Subgroups of the Pentagon Group
Proc. Royal Irish Academy 107 (2007), no. 1, 11-13
Groups with indexed co-word problem
joint with Derek Holt
Internat. J. Algebra Comput. 16 (2006), no. 6, 985-1014
Groups with context-free co-word problem
with
Derek Holt,
Sarah Rees and
Rick Thomas
J. London Math. Soc. (2) 71 (2005), no. 3, 643-657
On groups which are syntactic monoids of deterministic context-free languages
Internat. J. Algebra Comput. 14 (2004), no. 4, 499-504
On real-time word problems, with Derek Holt
J. London Math. Soc. (2) 67 (2003), no. 2, 289-301
Abstract commensurators of groups acting on rooted trees
Geom. Dedicata 94 (2002), 45-61
Subgroups of finitely presented simple groups
D.Phil. Thesis, University of Oxford 1999
Constructing finitely presented simple groups that contain Grigorchuk groups
J. Algebra 220 (1999), 284-313
This article contains the main results of the first half of my thesis.
Wachstum von endlich erzeugten Gruppen
Diplomarbeit, Albert-Ludwigs-Universität Freiburg i.Br. 1997