Speaker: Prof. Gus Lehrer Title: Classical and Quantum Invariant Theory Date: Friday, 16 October 2009 Time: 2:00 pm Venue: Room 4082, Red Centre, University of New South Wales Lunch/travel arrangements: We will leave Sydney Uni at 12:30 PM (meeting at the city Road gates) and take Gus for lunch before his talk. Please contact me beforehand firstname.lastname@example.org/0438948184 if you plan to join us, so that I can arrange taxi transportation for everyone. Abstract: Classical invariant theory, which has applications in diverse areas, such as Atiyah-Singer index theory, has been studied in 3 contexts, which are related in various ways. Despite its long history, there are still elementary unsolved problems. I shall discuss these, and indicate some generalisations to (non-commutative) quantum invariants. (Joint work with R Zhang and H. Zhang).