Geometric and Asymptotic Group Theory (GAGTA)

 In Workshop reports

Newcastle, Australia, 21–25 July 2015

This meeting explored a wide range of areas within geometric and combinatorial group theory, spanning asymptotic and probabilistic methods, as well as algorithmic and computational topics involving groups. Areas of interest included group actions, isoperimetric functions, growth, asymptotic invariants, random walks, algebraic geometry over groups, the complexity of algorithmic problems, generic properties and complexity, and applications to noncommutative cryptography.

Featured presentations were the event opener by Professor Sarah Rees on recent advances in surveying sofic groups, and the closing address by Associate Professor Kate Juschenko exploring cutting-edge amenability research. The University of Newcastle Vice Chancellor and President, Professor Caroline McMillen’s address during the conference banquet was also a highlight.

Professor Eamonn O’Brien gave an excellent talk illustrating links between his work on highly practical, computational (finite) group theory to infinite, geometric and asymptotic group theory.

With excellent schedule pace, high quality research presentations and opportunity for informal discussion, the event was a great success.

MathSciNet Classification
20F65, 20F69, 68Q01

Program structure

Web Links

Other Sponsors
The University of Newcastle: CARMA and Faculty of Science and Information Technology, The National Science Foundation (USA), AustMS

Dr Murray Elder, The University of Newcastle


Dr Murray Elder, The University of Newcastle
Dr Lawrence Reeves, The University of Melbourne
Dr Simon Smith, The University of Western Australia
Dr Anne Thomas, The University of Sydney

Special presenters

Associate Professor Yago Antolin Pichel, Vanderbilt University
Research interests: geometric group theory
Professor Oleg Bogopolski, University of Dusseldorf
Research interests: combinatorial and geometric group theory, algorithmic group theory, low-dimensional topology
Associate Professor Inna Bumagin, Carleton University
Research interests: geometric and combinatorial group theory
Swiss National Science Foundation Professor Laura Ciobanu, Université de Neuchâtel
Research interests: geometric group theory, formal languages in groups
Professor Volker Diekert, University Stuttgart
Research interests: word equations within algebraic systems, concurrent systems, traces theory, temporal logics and algebraic methods in computer science
Professor Susan Hermiller, University of Nebraska
Research interests: geometric and combinatorial group theory, asymptotic and homological properties
Associate Professor Kate Juschenko, Northwestern University
Research interests: geometric group theory, operator algebras, non-commutitive geometry
Professor John Meakin, University of Nebraska
Research interests: algebraic theory of semigroups, geometric group theory
Distinguished Professor Alexei Miasnikov, Stevens Institute of Technology
Research interests: combinatorial, geometric, algorithmic and asymptotic group theory
Associate Professor Masato Mimura, Tohoku University
Research interests: infinite discrete group theory, rigidity phenomena
Professor Eamonn O’Brien, University of Auckland
Research interests: finitely-presented groups and their quotients, isomorphism testing and computing automorphism groups of p-groups
Associate Professor Adam Piggott, Bucknell University
Research interests: combinatorial and geometric group theory, with a particular focus on the automorphism groups of groups, graph products of groups, and languages of normal forms for groups
Professor Sarah Rees, Newcastle University (UK)
Research interests: geometrical, combinatorial and computational group theory
Associate Professor Simon Smith, City University of New York
Research interests: group theory, combinatorics, permutation groups, graph theory, and topological groups
Associate Professor Enric Ventura, Universitat Politècnica de Catalunya · BarcelonaTech
Research interests: combinatorial, geometric, algorithmic, and asymptotic group theory
Professor Pascal Weil, University of Bordeaux
Research interests: theoretical computer science and algorithmic problems in algebra, combinatorial group theory

Participant Summary




  • Academic


  • Postdocs


  • Post Graduates


  • Students


  • Industry



Gender Breakdown

State Breakdown
Australian Capital Territory
New South Wales
South Australia
Western Australia
Northern Territory
Citizenship Status
Domestic - 41%
International - 59%
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