Mathematical Sciences Institute (MSI)
Seminars
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Mathematical Sciences Institute (MSI)
Seminars
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MSI Weekly Bulletin - Week starting Monday 16 November, 2009Unless otherwise stated, seminars are held in the Bernhard Neumann Seminar Room (G35) on the ground floor of the John Dedman Mathematical Sciences Building, Bldg 27 (Map). To have a seminar listed in this page, email the details to seminars.owner@maths.anu.edu.au. View all MSI colloquia for the year.
This week:
Tuesday 17 November, 2009
3.00pm
Algebra Seminar
On Coxeter's Families of Group Presentations
Derek Holt, University of Warwick
Seminar Room G35, John Dedman Building, Mathematical Sciences Institute
Abstract In 1939, Coxeter first studied the family of groups defined by the
presentations:
(l,m,n;q) = < r, s | r^l, s^m, (rs)^n, [r,s]^q >.
Until recently, the finiteness of only 6 of these groups remained undecided:
(2, 3, 13; 4), (3, 4, 9; 2), (3, 4, 11; 2), (3, 4, 13; 2), (3, 5, 6; 2) and
(3, 5, 7; 2).
We discuss a recent computational proof, carried out largely in Magma,
by George Havas and myself that (2, 3, 13; 4) is finite, and that
(3, 4, 13; 2) and (3, 5, 7; 2) are infinite.
Thursday 19 November, 2009
4.00pm
MSI Colloquium
Symmetry and enumeration of fractals
Kenneth Falconer
Seminar Room G35, John Dedman Building, Mathematical Sciences Institute
Abstract We describe a general method for enumerating the distinct self-similar fractals
that arise as attractors of certain families of iterated function systems,
using a little group theory to analyse the symmetries of the attractors. The
talk will be illustrated by a range of examples.
New Arrivals
Please welcome the following people to the MSI:
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Page last updated: 16 November, 2009 Please direct all enquiries to: MSI webmaster Page authorised by: Director, MSI |
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