## Presentations

### Plenary and Keynote Addresses

- A Unified Approach to Optimisation on Manifolds. Presented at the 7th Biennial Engineering Mathematics and Applications Conference (EMAC), September 2005, Melbourne, Australia.
- Introduction to the Theory of Optimisation on Manifolds. Presented at the International Workshop on Signal Processing Advances in Signal Processing (SPAWC), held in Lisboa, Portugal in July 2004, as part of a special plenary session on Differential Geometric Methods in Signal Processing, sponsored by the US National Science Foundation.

### Conference Presentations

- A Non-Bayesian Interpretation of Bayesian Statistics (and why estimation is an ill-posed problem). Presented at the Probability Conference at ANU in March 2006. This talk argues that there are no estimation problems, only decision problems. It also argues that Bayesian statistics only makes sense if the parameter is truly a random variable, and it shows how in other cases, the same mathematical expressions as arising in Bayesian statistics can be used when the parameter is not a random variable, but with a very different interpretation attached to the formulae.
- Group Representation Theory in Radar. Presented at the John Cossey Miniconference at ANU in August 2005. This talk shows how group representation theory, perhaps surprisingly, plays a large role in some of the fundamental theory of radar. Although there are no new results in this talk, and much has been done in this area, there is still potential for new results in radar theory to be proved by appealing to representation theory.

### Seminars

- Differential and Algebraic Geometry in Signal Processing. Presented at an MSI Colloquium at ANU on 4 August 2005. This informal talk endeavours to let mathematicians know that there are some deep mathematical problems in signal processing which might interest them.

### ANU College

- A Taste of Cryptograph and Number Theory. Presented at a one day Workshop for secondary school mathematics teachers held at ANU as part of the ANU College program.

### Speeches

- Occasional Address delivered at the Deakin University Graduation Ceremony in April 2008.