Weekly bulletin

Week starting Monday 21 May 2018

22 May - Algebra and Topology Seminar

Start time: 22 May
Location: John Dedman Building 27, Room JD1177 (meeting room)
Presenter(s): Michael Freedman (Microsoft Station Q)

Gross, et. al. defined an index for bosonic “locality preserving”  unitaries which measures net transport of quantum information (left or right). This index has a fermionic generalization (due to Fidkowski et.al.) important in Floquet physics. I will discuss a generalization of this index to higher dimensions where it assumes the form of an incompressible flow. I feel that this generalization is ½-interesting: Some new idea needs to be added to find cool applications, perhaps to knot or manifold invariants. I will seek the advice of the audience.

24 May - MSI Colloquium 2018

Start time: 24 May
Location: John Dedman G35 (Seminar Room)
Presenter(s): Michael Freedman (Microsoft Station Q)

In 1968 Waldhausen gave a beautiful proof that the three sphere has a unique (up to isotopy) Heegaard decomposition into two genus g handlebodies. I’ll show you Waldhausen’s proof and sketch one or two others. We'll then proceed to generalizations to other 3-manifolds, and parametric versions, e.g. the Powell conjecture (on which there is a recent arXiv posting with M. Scharlemann).

25 May

Location: ANU Sports hall Building 19, North Road Australian National University   

Young maths enthusiasts from across the region are invited to battle it out in a test of mind and muscles at ANU Maths Day.

In teams of five, year 12 students take part in mathematical challenges designed to build teamwork skills and promote a love of maths. The day is divided into four challenges:

  • a group of story problems
  • a swiss 'find the rule' problem
  • a cross number puzzle
  • and the day’s highlight, the relay – a test of brainpower and physical stamina.

ANU Maths Day has been running in the ACT since 1982. The University's competition includes contestants from schools in Canberra, Wollongong, the South Coast, Southern Highlands and Sydney. The day gives the students a chance to meet another 160 like-minded young people who are into mathematics, which is particularly important for people from smaller schools.

ANU Maths Day isn’t all about being the cleverest or the brightest. Activities are formulated to ensure that everyone can have a go and have fun while taking part in some healthy and rigorous competition.

Registrations will are open! 

Sample questions & solutions

Questions Solutions
2012 ANU Maths Day Swiss Contest (PDF 106KB)  
2012 ANU Maths Day Relay Contest (PDF 95KB) 2012 ANU Maths Day Relay Contest Answer Sheet (PDF 51KB)
2012 ANU Maths Day Cross Contest (PDF 106 KB)  
2012 ANU Maths Day Group Contest (PDF 67KB)

2012 ANU Maths Day Group Contest Answer Sheet (PDF 52KB)

25 May - Quantum mathematics meeting

Start time: 25 May
Location: John Dedman Building 27, Room JD1177 (meeting room)
Presenter(s): Daniel Barter (MSI)

We will discuss recent work joint with Jacob Bridgeman and Corey Jones on domain walls between topological phases.


25 May - Canberra Mathematics Enrichment programme

Start time: 25 May
Location: Mathematical Sciences Institute John Dedman Building #27, rooms LG101 & 102

Session 9 of the Canberra Mathematics Enrichment programme.