Computational Aspects
Totally Disconnected
Locally Compact Groups

24-28 October 2022

Workshop description

Totally disconnected locally compact (TDLC) groups naturally appear in various branches of mathematics, as they capture the structure of symmetries of various mathematical objects, and so it is natural to ask for a way of computing in such groups. Unfortunately, there is no formal framework for computation in TDLC groups and nor can there be one, as these groups are uncountable. However, one can hope to develop a formal framework of approximations analogous to the approximation of real numbers by rational numbers, with arbitrary precision.

Locally, TDLC groups are profinite, meaning that they can be understood through sequences of finite groups that increase in size. Computing with larger and larger finite groups would provide more and more precise approximations of local structure of TDLC groups, using formalisms from numerical analysis. Computational aspects of finite permutation groups have been well-studied and this is a very active area of research. The way the local structure is composed to form the large-scale picture of a TDLC group is not dissimilar to the structure of countable groups, for which there is also a well-developed theory of computation.

The aim of the proposed workshop is to bring together experts from four fields of mathematics: permutation groups, algorithmic group theory, numerical analysis, and formal systems and logic, to develop a basis for a framework of computation in TDLC groups and approximation thereof.

Invited speakers


Due to limited space for the workshop, we may need to restrict the total number of attendees. If you would like to attend, please complete this form to lodge your expression of interest in the workshop. Allocation of places will be based on merit.

» Registration Expressions of Interest «

The registration fee will cover the welcome reception, catering during the event and the workshop dinner. Fees are as follows:


*AMSI members, and members of AustMS and its affiliates


The workshop will be held from 24th to 28th October (Monday to Friday), 2022.


The schedule will be provided closer to the workshop.


The workshop will be held at Quest Newcastle West (787 Hunter St, Newcastle West NSW 2302 [Google map]).


The workshop organisers are:


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