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Talks given at conferences and seminars

Abstract regular polytopes aka string Cgroups.
Department of mathematics seminar, Shanxi Normal University, China, July 12, 2024.

Highly symmetric polytopes: recent results and future challenges.
Theoretical and Computational Algebra 2024, University of Aveiro, Portugal, June 30July 5, 2024.

Incidence geometry and discrete geometry with Magma.
Computational Algebra and Magma, University of Sydney, Australia, November 2729, 2023.

Towards a centralized system for mathematical objects.
Automated mathematics: integrating proofs, algorithms and data, Dagstuhl Seminar, Leibniz Center for Informatics, Germany, October 26, 2023.

Edgegirthregular graphs arising from biaffine planes and Suzuki groups.
Extremal Graphs arising from Designs and Configurations, BIRS Workshop, Banff, Canada, May 1519, 2023.

The Mondrian art puzzle.
Stochastic Topology and its Applications Seminar, Max Planck Institute for Mathematics in Sciences, Leipzig, Germany, April 3, 2023.

The number of string Cgroups of high rank.
PIMS SFU Operations Research Seminar, Simon Fraser University, Vancouver, Canada, February 2, 2023.

The number of string Cgroups of high rank.
Algebraic Graph Theory International Webinar, January 10, 2023.

Polyhedra, polytopes and finite simple groups.
Coloquio Oaxaceño de Matematicás, UNAM Oaxaca, Mexico, May 19, 2022

Abstract polytopes, groups and incidence geometries
PhD Course at the Universitet Umeå, Sweden, 16 hours, March 2022.

Polyhedra, polytopes and finite simple groups.
Mathematics Colloquium, Universitet Umeå, Sweden, December 9, 2021.

Which finite simple groups are automorphism groups of abstract chiral polytopes?
64th Annual Congress of the South African Mathematical Society, Online event, November 2931, 2021.

String Cgroup representations of finite groups.
Symmetries of Discrete Objects 2020, Rotorua, New Zealand, February 1014, 2020.

String Cgroup representations of finite groups.
Seminario Pregunton, UNAM Juriquilla, Queretaro, Mexico, August 22, 2019.

String Cgroup representations of finite groups.
Coloquio, UNAM Mexico City, August 20, 2019.

Rank reduction of string Cgroup representations .
9th Slovenian International Conference on Graph Theory  Bled'19, Slovenia, June 2429, 2019.

Abstract regular polytopes whose automorphism groups are alternating groups.
Beijing Jiaotong University, China, May 22, 2019.

Abstract regular polytopes whose automorphism groups are alternating groups.
Hunan First Normal University, Changsha, China, May 20, 2019.

Abstract regular polytopes whose automorphism groups are alternating groups.
International Workshop on Combinatorial and Computational Aspects of Optimization, Topology and Algebra
Merida, Yucatan, Mexico. December 37, 2018.

String Cgroup representations for the symmetric and alternating groups.
Hausdorff Institute for Mathematics, Bonn, Germany, November 2, 2018.

Introduction to incidence geometry with an emphasis on polytopes, hypertopes, maps and maniplexes.
Symmetries of Surfaces, Maps and Dessins, BIRS Workshop, Banff, Canada, September 2429, 2017.

Almost simple groups and polytopes.
Symmetries of Surfaces, Maps and Dessins, BIRS Workshop, Banff, Canada, September 2429, 2017.

An algorithm to classify chiral polytopes of a given group.
PRIMA Congress 2017, Special session on Discrete Mathematics, Oaxaca, Mexico, August 1418, 2017.

Alternating groups and polytopes.
All kinds of mathematics remind me of you, a conference in honour of Peter Cameron's 70th birthday, Lisbon, Portugal, July 2429, 2017.

Finite simple groups and highly symmetric hypertopes.
Department of Mathematics Seminar, Beijing Jiaotong University, China. April 7, 2017.

Finite simple groups and highly symmetric hypertopes.
International Workshop on Combinatorial and Computational Aspects of Optimization, Topology and Algebra
Los Cabos, Baja California Sur, Mexico. November 27  December 3, 2016.

Highly symmetric polyhedra and finite simple groups.
Seminar UGULB on Finite Geometries, Belgium. October 13, 2016.

Highly symmetric polytopes and finite simple groups.
Brussels Summer School in Mathematics, Brussels, Belgium, August 15, 2016.

Regular polytopes and almost simple groups.
10 hours minicourse, 2016 PhD Summer School in Discrete Mathematics, Rogla, Slovenia, June 26  July 2, 2016.

Hypertopes with diagrams of assigned shape.
AMS Fall Eastern Sectional Meeting, Special Session on Geometry and Combinatorics of Polytopes, Rutgers University, USA, November 1415, 2015.

Polytopes and symmetric groups.
University of KwaZuluNatal, South Africa, October 21, 2015.

Hexagonal extensions of toroidal hypermaps.
Algebra seminar, University of Aveiro, Portugal, October 7, 2015.

Hexagonal extensions of toroidal hypermaps.
Geometry and Symmetry, University of Pannonia in Veszprem, Hungary. June 29  July 3, 2015.

Hypertopes arising from Suzuki groups.
8th Slovenian International Conference on Graph Theory, Minisymposium on Polytopes and Graphs, Kranjska Gora, Slovenia, June 2226, 2015.

Abstract regular polytopes and projective lines.
Discrete Geometry and Symmetry, BIRS Workshop, Banff, Canada, February 913, 2015.

Abstract polytopes and projective lines.
Algebraic Combinatorics Seminar, Fields Institute, Toronto, Canada, February 6, 2015.

On primitive geometries of rank two.
Mathematics of Communications, BIRS Workshop, Banff, Canada, January 2630, 2015.

String Cgroups as transitive subgroups of Sym(n).
Geometry Seminar, Université Libre de Bruxelles, Belgium, December 19, 2014.

Fracture graphs and string Cgroups.
International Conference on Combinatorics and Graphs (ICM 2014 Satellite Conference),
Beijing Jiaotong University, China, August 812, 2014.

Symmetric groups and abstract regular polytopes.
Oberseminar Geometrie, Université de Fribourg, Switzerland, July 14, 2014.

Groups of Ree type in characteristic 3 acting on polytopes.
SIGMAP 2014, Great Malvern, United Kingdom, July 711, 2014

Symmetric groups and abstract regular polytopes.
Algebra Seminar, Université libre de Bruxelles, Belgium, July 4, 2014.

Cgroups and almost simple groups.
Retrospective Workshop on Discrete Geometry, Optimisation and Symmetry, Fields Institute, Toronto, Canada, November 2429, 2013.

Enumeration of regular maps associated to a given group and an application to the O'Nan sporadic simple group.
Algebra Seminar, University of Auckland, New Zealand, August 27, 2013.

Enumeration of regular maps associated to a given group and an application to the O'Nan sporadic simple group.
Graph Embeddings and Maps on Surfaces (GEMS) 2013, Smolenice, Slovakia, July 1519, 2013.

Abstract polytopes with O'Nan as automorphism group.
Discrete Geometry of Polytopes, Special Session of the AMS Spring Easter Sectional Meeting, Boston, USA, April 67, 2013.

Highly symmetric polytopes.
MIT Combinatorics Seminar, Boston, USA, April 5, 2013.

Suzuki groups are more chiral than regular.
36th Australasian Conference on Combinatorial Mathematics and Combinatorial Computing, Sydney, Australia, December 1014, 2012.

Highly symmetric polytopes.
New Zealand Mathematics and Statistics Postgraduate Conference, Auckland, New Zealand, November 1216, 2012.

Geometries constructed from the Suzuki simple groups.
Buekenhout Geometry, Ghent, Belgium, September 2021, 2012.

Magma Minicourse on Permutation Groups, 2 lectures.
Symmetries of Discrete Objects 2012, Queenstown, New Zealand,
February 1317, 2012.

Polytopes of high rank for the symmetric groups.
New Zealand Mathematical Society Colloquium, Auckland, New Zealand, December 68, 2011.

Polytopes of high rank for almost simple groups.
Workshop on Symmetry, Graphs and Polytopes, Fields Institute, Toronto, Canada, October 2427, 2011.

Some constructions in incidence geometry.
Algebra Seminar, University of Auckland, New Zealand, October 7, 2011.

Chirally regular polytopes.
Seventh Slovenian International Conference on Graph Theory, Bled, Slovenia, June 2025, 2011.

Searching for Geometries with Magma.
5th De Brun Workshop on Groups, Combinatorics and Computing, NUI Galway, Ireland, April 1116, 2011.

Regular and chirally regular polytopes.
London Algebra Colloquium, Imperial College, United Kingdom, March 24, 2011.

Polytopes arising from almost simple groups
Seminar UGULB on finite geometries, Universiteit Gent, Belgium, October 29, 2010.

Polytopes arising from almost simple groups
Workshop on Discrete Mathematics and Algorithms, Brussels, Belgium, October 5, 2010.

A journey through polytopes.
University of Auckland, Department of Mathematics Seminar, New Zealand, September 29, 2010.

Suzuki groups and polytopes
SIGMAP 2010, Oaxaca, Mexico, June 2025, 2010.

On the number of abstract regular polytopes whose automorphism group is a Suzuki simple group Sz(q).
Galois Geometries and Applications, Ghent, Belgium, May 2529, 2009.

Groups and Polytopes.
Colloquium, University of Ljubljana, Slovenia, April 9, 2009.

Locally sarctransitive graphs related to sporadic simple groups.
Group Theory, Combinatorics and Computation, Perth, Australia, January 516, 2009

Atlases of geometric structures.
4th International Conference on Combinatorial Mathematics and Combinatorial Computing, Auckland, New Zealand, December 1519, 2008.

On computing subgroup lattices of sporadic groups with Magma.
Seminar UGULBVUB on Finite Geometries, Belgium, April 11, 2008.

Apartments in incidence geometry.
Coloquio Victor NeumannLara de Teoria de las Graficas, Combinatoria y sus Aplicaciones, Zacatecas, Mexico, March 37, 2008.

On computing subgroup lattices of sporadic groups with Magma.
Pure Mathematics Seminar, University of Western Australia, November 30, 2007.

On computing subgroup lattices of sporadic groups with Magma.
Computational Algebra Seminar, University of Sydney, Australia, November 22, 2007.

On computing subgroup lattices of sporadic groups with Magma.
Deakin University, Melbourne, Australia, October 19, 2007.

On computing subgroup lattices of sporadic groups with Magma.
Department of Mathematics Seminar, University of Auckland, New Zealand, October 12, 2007.

From groups to polytopes.
Sixth Slovenian International Conference on Graph Theory, Special Session on Symmetry in Polyhedra and Polytopes, Bled, Slovenia, June 2630, 2007.

The Mathieu groups and their geometries.
Second Irsee Conference on Finite Geometries, Germany, September 1016, 2006.

A generalization of a construction due to Van Nypelseer.
Pure Mathematics Seminar  Mini Symposium, University of Western Australia, August 11, 2006.

Experimental and theoretical results on abstract regular polytopes.
Algebra Seminar, University of Kent, United Kingdom, February 27, 2006.

Atlases of abstract regular polytopes.
Seminar UGULBVUB on Finite Geometries, Belgium, November 9, 2005.

Atlases of abstract regular polytopes.
Geometry, Algebra, Singularities and Combinatorics seminar, Northeastern University, Boston, USA, October 24, 2005.

The Suzuki simple groups Sz(q) seen as automorphism groups of some geometric structures.
Number Theory seminar, Harvard University, Boston, USA, October 19, 2005.

Incidence geometry, finite group theory and computational algebra.
Combinatorics seminar, Massachussets Institute of Technology, Boston, USA, October 5, 2005.

Exploring incidence geometries with Magma.
Magma workshop on Group Theory and Algebraic Geometry, University of Warwick, United Knigdom, August 2226, 2005.

Les polyèdres de paix et les recouverments.
Contact Day for Highschool teachers and students, Université Libre de Bruxelles, Belgium, June 3, 2005.

Les débouchés professionnels pour les mathématiciens.
Contact Day for Highschool teachers and students, Université Libre de Bruxelles, Belgium, February 25, 2005.

A generalization of a geometric construction due to Van Nypelseer.
EIDMA Symposium 2004, Mierlo, The Netherlands, November 2526, 2004.

La vie d'un chercheur en mathématique.
Haute Ecole Galilée, Brussels, Belgium, May 12, 2004.

An algorithmic analysis of the intersection property.
Seminar UGentULB on Finite Geometries, Universiteit Ghent, Belgium, April 30, 2004.

The residually weakly primitive geometries of HS.
28th Australasian Conference on Combinatorial Mathematics and Combinatorial Computing, Melbourne, Australia, December 1519, 2003.

A family of geometries related to the Suzuki tower.
Workshop on Incidence Geometry, Adelaide, Australia, December 912, 2003.

Quotients of a Universal Locally Projective Polytope of type {5,3,5}.
Seminar RUGULB on Finite Geometries, Free University of Brussels, Belgium, May 16, 2003.

Residually weakly primitive sporadic geometries.
First Irsee Conference on Finite Geometries, Irsee, Germany, February 1621, 2003.

Incidence Geometry, Finite Group Theory and Computer Algebra.
EIDMA Minicourse on "New Approaches to Computing Finite Groups Invariants", Université Libre de Bruxelles, Belgium, April 1519, 2002.

Computational methods in Incidence Geometry.
Computational Algebra Seminar, University of Sydney, Australia, January 31, 2002.

Incidence Geometry, Finite Group Theory and Computer Algebra.
Joint Seminar Monash UniversityDeakin University, Melbourne, Australia, January 21, 2002.

RWPRI and (2T)_1 flagtransitive linear spaces.
Finite Geometries, Oberwolfach, Germany, December 38, 2001.

Geometries for the Mathieu group M_23.
EIDMA Symposium 2001, Oostende, Belgium, October 2526, 2001.

Equipped Affine Spaces.
Seminar RUGULB on Finite Geometries, University of Gent, Belgium, May 4, 2001.

Incidence Geometry, Finite Group Theory and Computer Algebra.
Universiteit Nijmegen, The Netherlands, November 23, 2000.

RWPRI coset geometries: a survey.
INDAM Intensive Session on Groups and Geometries, Milan, Italy, MayJune, 2000.

On a rank five geometry of Meixner for the Mathieu group M_12.
Seminar RUGULB on Finite Geometries, University of Gent, Belgium, March 17, 2000.

On a rank five geometry of Meixner for the Mathieu group M_12.
Kolloquium des Instituts der Fachbereich für Mathematik und Informatik, MartinLutherUniversität HalleWittenberg, Germany, October 26, 1999.

Incidence geometry and finite groups.
(Moufang) Polygons and (Twin) Buildings, Belgium, June 2125, 1999.

Constructing coset geometries with MAGMA.
Algebra Seminar, University of Sydney, Australia, April 23, 1999.

Constructing coset geometries with MAGMA.
University of Newcastle, Australia, April 22, 1999.

Thin regular geometries constructed from finite groups.
21ste Discrete Dag, The Netherlands, December 11, 1998.

Geometries for the Suzuki simple groups Sz(q).
Combinatorics '98, Italy, June 1420, 1998.

The Residually Weakly Primitive Geometries of the Suzuki groups.
Discrete Algebra and Geometry Day, The Netherlands, March 20, 1998.

Exploring the O'Nan group with MAGMA.
Seminar RUGULB on Finite Geometries, University of Gent, Belgium, January 30, 1998.

The RWPRI geometries of the Suzuki simple group Sz(8).
Groups St Andrews 1997 in Bath, United Kingdom. July 26August 9, 1997.

The RWPRI geometries of the Suzuki simple group Sz(8).
Third International Conference on Finite Geometry and Combinatorics, Deinze, Belgium, May 1824, 1997.

An Introduction to Research in Incidence Geometry.
University of Newcastle, Australia, April 21, 1997.

An Introduction to Research in Incidence Geometry.
Algebra seminar, University of Sydney, Australia, April 18, 1997.

The RWPRI geometries of the symmetric group Sym(7).
Seminar RUGULB on Finite Geometries, University of Gent, Belgium, February 16, 1996.
Country

Number of talks

Belgium

23

Australia

15

Canada

9

New Zealand

9

Mexico

8

Germany

7

Slovenia

6

USA

6

China

5

United Kingdom

5

The Netherlands

4

Portugal

3

Italy

2

Online

2

Sweden

2

Hungary

1

Ireland

1

Slovakia

1

South Africa

1

Switzerland

1

