talks
MAPS Professorial Lecture Series, UTS, 3 May 2024
Which graphs have unique shortest paths? pdf
AAC Seminar Stevens NJ, 22 April 2024
A new type of pumping lemma for multiple context free languages pdf
Oberseminar, FMI Stuttgart, 20 March 2024
Some properties of multiple context-free languages
Geometry and topology seminar University of Geneva 12 March 2024
Some properties of multiple context-free languages
Manchester Semigroups Seminar 1 March 2024
A new pumping-type lemma for multiple context free languages
Heriot-Watt Maximals Seminar Feb 21 2024
Graphs and groups with unique geodesics
North British Geometric Group Theory Seminar Newcastle University (UK) Feb 14 2024
How hard is it to know if there is an epimorphism from one group to another?
GAGTA 2024, CIRM Luminy France, Feb 2024
When is a Cayley graph geodetic?
Oxford Mathematical Institute Geometric Group Theory seminar, 31 Jan 2024 1:30pm
How hard is it to know if there is an epimorphism from one group to another?
Complexity Day, CUNY, New York, Dec 8 2023
When is a Cayley graph geodetic? recording
AustMS conference, Algebra and Combinatorics special session, UQ Brisbane Dec 2023
On the complexity of epimorphism testing with virtually abelian targets
AAC 2023 Monash Nov 24 2023
Finite groups with geodetic Cayley graphs
Australasian Logic Colloquium UQ Brisbane Nov 7 2023
On the complexity of epimorphism testing with virtually abelian targets
ICMAT Group Theory Seminar, Madrid, May 18 2023
The search for a k-geodetic group
Barcelona Group Theory Weekend 5 May 2023
Multiple context free languages
Oberseminar, FMI Stuttgart, 12 April 2023
The search for a k-geodetic group
Mindanao State University-Iligan Institute of Technology (MSU-IIT) Seminar in Algebra (online) 22 March 2023
Solving equations in groups
UNSW Pure Mathematics Seminar, 7 March 2023
Is F automatic?
Australian Mathematical Society Annual Meeting UNSW, 8 Dec 2022
k-geodetic groups
6th Australian Algebra Conference University of the Sunshine Coast, 30 Nov 2022
Multiple context free languages (research talk)
6th Australian Algebra Conference University of the Sunshine Coast, 29 Nov 2022
Avoiding permutations, stack sorting and k-pop (public lecture)
AMS-EMS-SMF 2022 congress Special Session on Group Theory, Algorithms and Applications, University of Grenoble, France July 20, 2022
Some new results about groups presented by finite convergent length reducing rewriting systems
Straight-Line Programs, Word Equations and their Interplay ICALP 2022 Satellite Workshop, July 4, 2022, Paris
SLPs in the proof that isomorphism testing for plain groups is in Sigma_3^P
Permutation Patterns 22 Valparaiso University, Indiana, USA 22 June 2002 (online)
2-avoidance
Groups, Analysis, Geometry Seminar, UTS, 12 May 2022
Plain groups, rewriting systems and complexity
New York group theory seminar CUNY Graduate Center, 18 February 2022 4pm NY time (online)
On groups presented by inverse-closed finite convergent length-reducing rewriting systems video
Australian Mathematical Society Annual Meeting Special session in Algebra 8-11 December 2021 (hybrid)
Equations in hyperbolic groups
Australian Algebra Conference UWA (online) 17 November 2021 (online)
The isomorphism problem for plain groups is in Σ_3^P
Algorithmic problems in algebra and logic (Adian seminar) Moscow (online) November 9 2021
Plain groups and rewriting systems
Automata Theory and Applications: Games, Learning and Structures NUS Singapore (online) September 2021
Detecting plainness in NP
Workshop on Computation Group Theory Oberwolfach Germany (online) August 2021
Rewriting systems and what kinds of groups they present
UTS Mathematics Colloquium (online) 13 July 2021
Rewriting systems, algorithms and a 35 year old conjecture
Geometric Group Theory in East Asia (online) 11 June 2021
Deciding plainness in PSPACE
Sydney Mathematical Research Institute 8 April 2021
Which groups have polynomial geodesic growth?
Groups-Semigroups-Topology seminar Univ of Nebraska Lincoln (online) 9am Sydney time, 16 Feb 2021
Some new kinds of automatic groups
Australian Algebra Conference Univ of Melbourne , 18-20 January 2021 (online)
A virtually 2-step nilpotent group with polynomial geodesic growth
International Conference in Mathematics and Applications Bangkok, Thailand Dec 18-20 2020 (Plenary; online)
Which groups have polynomial geodesic growth?
AustMS Annual Meeting UNE (Virtual) 6-8 Dec 2020: Special session on Algebra
What is a C-Cayley position-faithful linear-time computable group? recording
Australian Geometric Topology Webinar (online) 25 Nov 2020
Rewriting systems, plain groups, and geodetic graphs
Pure Mathematics Seminar University of Queensland 4 Nov 2020
k-pop and 2-avoidance
University of Adelaide Colloquium, 12 October 2020
Equations in groups
University of Adelaide Geometry Seminar, 9 October 2020
Rewriting systems and geodetic graphs
Western Sydney University Abend Seminars, 17 Sept 2020 (Virtual via Zoom)
Some new kinds of automatic groups
Symmetry in Newcastle 4 Sept 2020 (Virtual via Zoom)
Rewriting systems and geodetic graphs
Permutation Patterns 2020 Valparaiso University, Indiana, USA June/July 2020 (Virtual Workshop)
2-avoidance slides
University of Geneva Groups and Geometry Seminar June 2020 (Virtual via Zoom)
Co-word problems and geodesic growth in finitely generated groups
Heriot Watt MAXIMALS Seminar Nov 2019
Avoiding permutations and sorting with stacks
St Andrews Pure Mathematics Seminar Nov 2019
A new kind of automatic group
Newcastle University UK, Nov 2019
A new kind of automatic group
Newcastle University UK EDI event, Nov 2019
Avoiding permutations, stack sorting and k-pop
Mahidol University Bangkok Thailand, Sept 2019
Avoiding permutations and sorting with stacks
5th biannual international group theory conference ITB Bandung, Indonesia Jul 2019
Solving equations in groups
CARMA Colloquium Newcastle May 2019
Sorting permutations with stacks
Algorithmic Problems in Group Theory Dagstuhl, Germany Mar 2019
EDT0L and NSPACE
HW Maximals Seminar Heriot Watt University, Edinburgh Feb 2019
Graph automatic groups
Asia-Australia Algebra Conference Western Sydney University, Parramatta, Australia Jan 2019
Equations in hyperbolic groups
UTS Maths Teaching Seminar Dec 2018
What is Discrete Mathematics 37181?
Equations in one-relator groups and semigroups ICMS Edinburgh, Scotland Sept 2018
Describing solutions to equations over groups in terms of formal languages in PSPACE
GAGTA Seoul Korea Jul 2018
The structure and complexity of solutions to equations over groups
Oberwolfach, Germany 4 Jun 2018
Is F automatic?
LATA 2018 Bar-Ilan near Tel Aviv, Israel, 10 Apr 2018
Permutations sorted by a finite and an infinite stack in series
Discrete Structures and Algorithms Seminar, Univ of Melbourne, 8 Mar 2018
Pattern avoiding permutations and stack sorting
Algebra Special Session, Australian Mathematical Society Annual Meeting, Macquarie 14 Dec 2017
Permutations sorted by a finite and an infinite stack in series
Group actions seminar, University of Sydney, 23 August 2017
The structure of solutions to equations in free and virtually free groups
CQSI Seminar, UTS, 9 August 2017
The structure of solutions to equations in free and virtually free groups
ICALP 2017 Warsaw Poland 13 July 2017
Solutions of twisted word equations, EDT0L languages, and context-free groups
CATS2017 Sydney 1 July 2017
Solving equations in groups
Groups in Galway 19 May 2017
Solving equations in virtually free groups
Statistics/Algebra Seminar, University of Glasgow 12 May 2017
Probabilistic and statistical aspects of geometric group theory
Workshop on Groups, Generalisations and Applications, St Andrews Scotland May 4 2017
Solving twisted word equations in PSPACE
University of Technology Sydney Feb 1 2017
Random walks on groups
Victorian Algebra Conference LaTrobe Nov 22 2016
Solving twisted equations
MAPS Research Seminar Series, Newcastle, Oct 28 2016
Equations in groups
Workshop on the Thompson Groups, University of Southern Denmark in Odense, Aug 15 2016
Using random walks to detect amenability in finitely generated groups
Computation in geometric and combinatorial group theory, ICMS Edinburgh, Jul 12 2016
Solving equations in free groups; random walks and amenability
Universal Structures in Mathematics and Computing LaTrobe Jun 28 2016
Pattern languages and equations in free groups
Tufts geometric group theory conference, Boston, USA, Jun 21 2016
Random walks and amenability
Hunter School of the Performing Arts, Newcastle, May 27 2016
Percolation on infinite graphs
EECS Seminar, EF122, Newcastle, May 11 2016
Finding all solutions to word equations in NSPACE(nlogn)
Université de Neuchâtel, Switzerland, Mar 22 2016
Using random walks to detect amenability in finitely generated groups
Equations and formal languages in algebra conference, Les Diablerets, Switzerland Mar 2016
Languages and groups (minicourse 2 lectures)
CARMA summer research scholar seminar, Jan 13 2016
What is a group?
Algebra/Geometry/Topology Seminar, The University of Melbourne, Dec 9 2015
Random walks and amenability
Victorian Algebra Conference, UWS Parramatta, Dec 1 2015
Random walks and amenability
Geometric and probabilistic methods in group theory and dynamical systems, Texas A&M, Nov 11 2015
Using random walks to detect amenability in finitely generated groups
AustMS annual meeting, Groups and Monoids Special Session, Flinders U, Sept 30 2015
Using random walks to detect amenability in finitely presented groups
GAGTA9 CIRM, Marseille, France, Sept 14 2015
Solution sets for equations over free groups are EDT0L languages
Universität Stuttgart, Germany, Sept 11 2015
Solving equations in free groups
Université de Neuchâtel, Switzerland, Sept 1 2015
Solving equations in free groups
Pure Mathematics Seminar, The University of Queensland, Aug 18 2015
Finding all solutions to an equation in a free group in NSPACE(nlog n)
Geometry Seminar, Tohuko University, Japan, Jul 14 2015
Solving equations in free groups
Informal Seminar, Tohuko University, Japan, Jul 14 2015
Random walks, amenability and cogrowth
ICALP 2015 (International Colloquium on Automata, Languages, and Programming) Kyoto, Japan, Jul 9 2015
Solution sets for equations over free groups are EDT0L languages
Workshop on Mathematics and Computation, Newcastle, Jun 20 2015
Computational problems in infinite groups
University of Western Sydney Colloquium, May 27 2015
Solving word equations - more details
Groups and Combinatorics Seminar, UWA, May 22 2015
Solving equations in free groups -- more details
School of Mathematics and Statistics Colloquium, UWA, May 21 2015
Solving equations in free groups
University of Western Sydney Colloquium, May 13 2015
Solving word equations
Undergraduate Maths Talks, Newcastle, Apr 28 2015
Solving equations in free groups
General Algebra/Lie Algebra/Graph Theory Seminar, LaTrobe, Mar 23 2015
Solving equations in free groups and free monoids with constraints - more details
School of Mathematics and Statistics Colloquium, LaTrobe, Mar 20 2015
Solving word equations
Victorian Algebra Conference, Monash, Oct 2-3 2014
Equations in free groups and free monoids
GTA Seminar, U Sydney, Sept 24 2014
The complexity of solutions to equations in free groups
Universität Stuttgart, Germany, June 19 2014
Pattern avoiding permutations and sorting with stacks
Workshop on the Extended Family of R. Thompson's Groups, St Andrews, Scotland, May 26 2014
Computing cogrowth and amenability in groups
Algebra-Geometry Seminar, Newcastle University, UK, May 22 2014
Computing cogrowth and amenability in groups
CIRCA Seminar, University of St Andrews, Scotland, May 21 2014
An algebraic generating function for permutations generated by a stack of depth 2 and infinite stack in series
CARMA Seminar, University of Newcastle (AU), May 14 2014
An algebraic generating function for permutations generated by a stack of depth 2 and infinite stack in series
Université de Neuchâtel, Mar 6 2014
Cogrowth of finitely generated groups
Groups acting on rooted trees and around conference IHP Paris, Feb 2014
Random walks on trivial words in groups
37ACCMCC UWA Perth Dec 9 2013
Counter-graph automatic groups
Victorian Algebra Conference, U Melbourne, Nov 28 2013
A Metropolis Markov Chain algorithm to sample trivial words and compute cogrowth in finitely generated groups; or - F is not amenable
CARMA Seminar, University of Newcastle, Nov 21 2013
A Metropolis Markov Chain algorithm to sample trivial words and compute cogrowth in finitely generated groups; or - F is not amenable
University of Western Sydney Colloquium, Nov 4 2013
Computing with infinite groups -- cogrowth; and logspace normal forms
AustMS annual meeting, Algebra Special Session, U Sydney, Oct 1 2013
Extending the concept of an automatic group
AustMS annual meeting, Group Actions Special Session, U Sydney, Sept 30 2013
The cogrowth series for BS(n,n) is D-finite
CARMA Retreat, Aug 17 2013
k-closures of groups acting on trees
CARMA Mathematical Taster Seminar, Aug 8 2013
Equations in free groups
Université de Neuchâtel, Jul 9 2013
Extending the concept of an automatic group
University of Wollongong Colloquium, June 14 2013
Extending the concept of an automatic group
GAGTA 2013 City University of New York, May 2013
C-graph automatic groups
CARMA Seminar, University of Newcastle, May 16 2013
C-graph automatic groups
Monash Discrete Maths seminar, Apr 29 2013
Thompson's group F
Group theory international webinar, (Online) Mar 14 2013
Some results about growth and cogrowth for finitely generated groups
EMCR Symmetry workshop, Newcastle Dec 7 2012
Computing symmetry
Victorian Algebra Conference, RMIT Nov 30 2012
What is a totally disconnected locally compact group?
Pure Mathematics Seminar, University of Queensland, Nov 7 2012
Embedding Baumslag-Solitar groups into totally disconnected locally compact groups
Computer Science Colloquium, Hofstra University, Oct 10 2012
What is a self-similar group?
New York Group Theory Seminar, Oct 5 2012
Embedding Baumslag-Solitar groups into totally disconnected locally compact groups
AustMS annual meeting, group actions session, University of Ballarat, Sept 26 2012
Embedding Baumslag-Solitar groups into totally disconnected locally compact groups
CARMA Seminar, University of Newcastle, Sept 20 2012
Totally disconnected locally compact groups from Baumslag-Solitar groups
Undergraduate talks in mathematics, University of Newcastle, Sept 11 2012
Computing in logspace
GAGTA2012 Düsseldorff, Germany, Aug 2 2012
New examples of totally disconnected groups
Algebra and Analysis Seminar, University of St Andrews, Scotland, Jul 25 2012
Self-similar groups and their Schreier graphs
CARMA Colloquium, University of Newcastle, Jun 14 2012
What is a self-similar group?
School of Mathematical Sciences Colloquium, University of Adelaide, Apr 20 2012
What is a self-similar group?
Differential Geometry Seminar, University of Adelaide, Apr 20 2012
New examples of totally disconnected, locally compact groups
IMIA seminar, University of Wollongong, Mar 21 2012
Finding short words in the first Grigorchuk group
AMSI workshop on 'Connecting finite and infinite mathematics through symmetry', University of Wollongong, Feb 1-3 2012
New examples of totally disconnected groups
SAMS-AMS Joint meeting, Special session on combinatorial and computational group theory, Nelson Mandela University, Port Elizabeth, South Africa, Dec 1 2011
New examples of totally disconnected groups
Algebra-Geometry-Topology seminar, The University of Melbourne, Nov 22 2011
New examples of totally disconnected, locally compact groups coming from geometric group theory
AustMS annual meeting, algebra and number theory session, University of Wollongong, Sept 28 2011
New results about Baumslag-Solitar groups
CARMA Colloquium, University of Newcastle, Aug 18 2011
Stack sorting and pattern-avoiding permutations
GTA Seminar, University of Newcastle, May 31 2011
Computing in infinite groups in logspace
CARMA Seminar, University of Newcastle, Mar 24 2011
Finding short words in the Grigorchuk group
Infinite groups seminar, University of Sydney, Nov 22 2010
What is ... a sofic group?
CARMA Colloquium, University of Newcastle, Nov 18 2010
Random subgroups of Thompson's group F
Victorian algebra conference, Monash, Nov 4-5 2010
Closure properties of logspace computable groups
AustMS annual meeting, Special session on algebra and number theory, UQ, Sept 2010
Logspace computable groups
Algebra, Combinatorics and Topology Seminar, UQ, Mar 23 2010
Generating functions and context-free grammars
Algebra, Combinatorics and Topology Seminar, UQ, Jan 19 2010
Computing geodesics in BS(1,p) in linear time
Victorian Algebra Conference, University of Melbourne, Nov 5-6 2009
What is ... a sofic group?
Mathematics Colloquia Series, LaTrobe University, Nov 3 2009
Computing in infinite groups
PhD Journal Club, UQ, Oct-Nov 2009
Introductory lectures on geometric group theory (series of talks given together with Stephan Tillmann)
AustMS Conference, Special Session on Geometry and Topology, University of South Australia, Sept 29, 2009
Geodesic growth and cogrowth for groups
Maths Teaching Seminar, UQ, May 13 2009
Matlab in 1051 - making it real, integrated, relevant
Stevens/ACC Webinar, Online, Apr 6 2009 (3pm NJ time)
Some geodesic problems
Algebra and Combinatorics Seminar, UQ Mar 31 2009
Geodesics in the first Grigorchuk group
Computer Science Colloquium, Hofstra University, Mar 18 2009
Pattern avoiding permutations and sorting with stacks
Geometric and asymptotic group theory with applications, Stevens Inst of Tech, Mar 9 2009
Counting elements and geodesics in groups
Algebra and Combinatorics Seminar, UQ, Oct 7 2008
Stallings' group has a quadratic Dehn function
Victorian Algebra Conference, RMIT, Oct 3 2008
Stallings' group has a quadratic Dehn function
Algebra-Geometry-Topology Seminar, University of Melbourne, Aug 26 2008
Amenability and percolation for infinite graphs
Algebra and Combinatorics Seminar, UQ, July 29 2008
Amenability and percolation
School of Physical Sciences Colloquium, UQ, May 16 2008
Rapid transit in groups - finding your way around BS(1,p)
Geometry/Topology Seminar, University of Melbourne, Mar 20 2008
Geodesic growth
Algebra and Combinatorics Seminar, UQ, Mar 11 2008
Geodesics in groups - describing, counting and computing them
Algebra and Combinatorics Seminar, UQ, Mar 4 2008
Pattern avoiding permutations and sorting with stacks
Fields Workshop in Asymptotic Group Theory and Cryptography, Carleton University, Ottawa, Dec 15 2007
Stallings' group has a quadratic Dehn function
New York Group Theory Seminar, CUNY Graduate Center, New York, Nov 16 2007
Stallings' group has a quadratic Dehn function
Universidad de los Andes, Bogota, Colombia, Oct 4 2007
¿Cuales un grupo automatico?
University of Queensland, Brisbane, Sept 3 2007
Counting tree pairs and random subgroups
Geometry and Topology Seminar, The University of Melbourne, Jul 23 2007
Thompson's group F
Stevens Inst Tech, ACC Seminar, May 3 2007
Generating functions and asymptotic subgroups of Thompson's group
Colloquium Rutgers University, Mar 28 2007
Asymptotic subgroups of groups
Groups 007 CIRM, Marseille, France, Mar 1 2007
Asymptotic properties of subgroups of Thompson's group F
Cornell University, Topology and Geometric Group Theory Seminar, Feb 6 2007
Asymptotic properties of subgroups of Thompson's group F
University of British Columbia, Vancouver, Canada, Discrete Math Seminar, Nov 21 2006
Asymptotic density and Thompson's group F
Math dept seminar, Bowdoin College, Maine, Nov 8 2006
G-automata and word problems for groups
Math student seminar, Bowdoin College, Maine, Nov 8 2006
Stack sorting
New York Group Theory Seminar, CUNY Graduate Center, Oct 20 2006
Automata you can count on
Stevens Inst of Tech, Computer Science Seminar, Oct 10 2006
Stack sorting and permutation patterns
Ohio State University, Geometric Group Theory Seminar, Oct 4 2006
D-finiteness and group growth
Tufts University, GGT@Tufts Seminar, Sept 26 2006
D-finiteness and group growth
University of Wollongong, HSC Maths Day, Jul 3 2006
The binomial theorem, permutations and combinations
Stat-Mech Seminar, University of Melbourne, May 18 2006
Permutations generated by stack in series
Stevens Institute of Technology, Hoboken, New Jersey, Mar 6 2006
Pattern-avoiding permutations
University of Wollongong, Colloquium, Mar 2 2006
An introduction to pattern-avoiding permuations
Manifolds in Melbourne, Jan 2006
Zimin words, Schreier graphs, dead ends, and Grigorchuk's group
University of Sydney, Algebra seminar, Sept 2 2005
Looking for short words in the first Grigorchuk group
Groups St Andrews, Scotland, Aug 4 2005
Limit groups and games you can play with Cayley graphs
Barcelona Conference on Geometric Group Theory, CRM, Spain, Jul 1 2005
Zimin words, Schreier graphs, and Grigorchuk's group
Asymptotic and Probabilistic Methods in Geometric Group Theory, Geneva, Jun 23 2005
Languages of geodesics in groups
CRM, Barcelona, Seminari de Geometria del Problema de la Paraula, Jun 17 2005
Geodesics in the first Grigorchuk group
University of St Andrews, CIRCA Seminar, May 18 2005
Words in the Grigorchuk group
University of Washington, Combinatorics Seminar, Apr 20 2005
Formal languages and patttern avoiding permutations
New York Group Theory Seminar, CUNY Graduate Center, Apr 1 2005
Formal languages and some problems in combinatorics
Pattern Avoiding Permutations 05, Gainsville, Florida, Mar 2005
Pattern avoiding permutations are context-sensitive
Combinatorics Seminar, University of Melbourne, Feb 10 2005
New ideas for restricted permutations
Fields Institute Algebraic Combinatorics Seminar, Toronto, Canada, Dec 15 2004
Pattern avoiding permutations are context-sensitive
Canadian Mathematical Society Winter Meeting, Montreal, Canada, Dec 12 2004
Geodesic languages for the lamplighter groups and other wreath products
University of Washington, Algebra Seminar, Oct 19 2004
A context-free and a counter geodesic language for Baumslag-Solitar groups
Albany Group Theory Conference, Rensselaerville, New York, Oct 9 2004
Having a counter full language of geodesics is not invariant under change of generating set
University of Newcastle Upon Tyne, Algebra Seminar, May 20 2004
Regular, context-free and counter geodesic languages for groups
University of Glasgow Algebra Seminar, May 5 2004
Formal languages of geodesics in groups
Edinburgh & Heriot-Watt Algebra Seminar, May 4 2004
Regular, context-free and counter languages of geodesics in groups
Conference on Geometric Group Theory, Bedlewo, Poland, Apr 18-24 2004
Geodesic languages for the lamplighter groups
Binghamton University, Geometry/Topology Seminar, Binghamton, New York, Apr 1 2004
Regular, context-free and counter languages of geodesics
Cornell University, Topology & Geometric Group Theory Seminar, Ithaca, New York, Mar 30 2004
Regular, context-free and counter languages of geodesics
AMS Sectional Meeting, Special session on probabilistic and asymptotic aspects of group theory, Athens, Ohio, Mar 26 2004
A context-free language of geodesic normal forms for Baumslag-Solitar groups
University of St Andrews, CIRCA seminar, Mar 10,24 2004
Formal language classes; Regular, context-free and counter languages of geodesics for the Lamplighter groups
Albany Group Theory Conference, Rensselaerville, New York, Oct 19, 2003
A context-free language of geodesics for Baumslag-Solitar groups
Brandeis University, Topology Seminar, Waltham, Massachusetts, Sept 24, 2003
Patterns theory for some Cayley graphs of groups
Spring Topology and Dynamics Conference, Lubbock, Texas, Mar20, 2003
Regular geodesic languages in CAT(0) groups
New York Group Theory Seminar, CUNY Graduate Center, Feb 2003
Combinatorial conditions that imply word-hyperbolicity for 3-manifolds
Columbia University Geometric Topology Seminar, New York, Feb 14 2003 (current page)
Minimal almost convexity and Baumslag-Solitar groups
Wasatch Topology Conference, Salt Lake City, Utah, Oct 26 2002
The loop shortening property and almost convexity
University of Melbourne, Geometry/Topology seminar, Melbourne, Australia, May 20 2002
A new class of word-hyperbolic 3-manifolds
AMS National Meeting, Special Session on Computational Topology, San Diego, California, Jan 8 2002
A special case of the weak hyperbolization conjecture
Albany Group Theory Conference, Rensselaerville, New York, Oct 13 2001
The loop shortening property for groups
Finitely Presented Groups: Questions and Algorithms, Trento, Italy, Jul 24 2001
Patterns theory and geodesic automatic structure
Workshop on Geometric Group Theory, Montreal, Canada, Jul 2001
Finiteness and the falsification by fellow traveler property
York University Algebra Seminar, Toronto, Canada, Apr 16 2001
Curvature testing in metric polyhedral complexes and lunar exploration
Groups-semigroups-topology seminar, University of Nebrska Lincoln, Mar 2001
Patterns theory and automatic groups
Rice University, Houston, Texas, Jan 29 2001
Curvature testing in metric polyhedral complexes and lunar exploration
Albany Group Theory Conference, Rensselaerville, New York, Oct 14 2000
Finiteness properties and almost convexity
Texas A&M University, Algebra and Combinatorics Seminar, College Station, Texas, Oct 2 2000
Geodesics and patterns in groups
Computational and Geometric Aspects of Groups and Semigroups Conference, Lincoln, Nebraska, May 19 2000
Finiteness properties for almost convex groups
Conference on Computational and Geometric Group Theory, Sydney, Australia, Nov 1999
Patterns theory and automatic groups
AustMS/AMS Joint meeting, Melbourne Jul 12-16 1999
A non-Hopfian almost convex group
This page is a record of all the research talks (plus others) I have given since near the end of my PhD, when I started keeping a record