# Pure mathematics seminars

We present regular seminars on a range of pure mathematics interests. Students, staff and visitors to UQ are welcome to attend, and to suggest speakers and topics.

Seminars are usually held on Tuesdays from 3pm to 3.50pm.

Talks comprise 45 minutes of speaking time plus five minutes for questions and discussion.

#### Information for speakers

Researchers in all pure mathematics fields attend our seminars, so please aim your presentation at a general mathematical audience.

Contact us

To volunteer to talk or to suggest a speaker, email Ole Warnaar or Ramiro Lafuente.

### Contacts

Ole Warnaar

Ramiro Lafuente

### From topology to combinatorics and back: Width-type parameters of 3-manifolds

8 October 2019 3:00pm–4:00pm

Dr Jonathan Spreer (The University of Sydney)

### On Signed Magic Rectangles

24 September 2019 3:00pm–4:00pm

Professor Abdollah Khodkar (University of West Georgia)

### Facial weak order in hyperplane arrangements

16 August 2019 3:00pm–4:00pm

Aram Dermenjian, from the Université du Québec à Montréal

### The q-deformed Haldane--Shastry spin chain: from the affine Hecke algebra, via 'freezing', to exact eigenvectors

17 May 2019 11:00am–12:00pm

Dr Jules Lamers (The University of Melbourne)

### Oscillations of the Prime Number Theorem Error Term

14 May 2019 3:00pm–4:00pm

A commonly known version of the prime number theorem is that the prime number counting function pi(x) grows like x/log(x). An equivalent statement is that the Chebyshev Psi function Psi(x) grows like x. It goes back to Littlewood that the error term Psi(x) - x changes sign infinitely many times. We refine a method of Kaczorowski to give a lower bound on the number of sign changes in Psi(x) - x.

### Non-negative curvature on exotic spheres

26 February 2019 3:00pm–4:00pm

Martin Kerin, University of Münster in Germany

### Finite-time blowup of n-harmonic map flow

14 February 2019 11:00am–12:00pm

Leslie Cheung, School of Mathematics and Physics

### Counting matrices over finite fields and the topology of the moduli space

2 October 2018 3:00pm–4:00pm

Dr Masoud Kamgarpour, School of Mathematics and Physics, UQ

### The topology and geometry of spaces of Yang-Mills-Higgs flow lines.

31 July 2018 3:00pm–4:00pm

Graeme Wilkin, National University of Singapore

### Approximate curvatures of generalized surfaces

24 July 2018 3:00pm–4:00pm

Gian Paolo Leonardi (Università di Modena e Reggio Emilia)

### Reduced expressions and similarities between categories.

20 February 2018 4:00pm–5:00pm

Se-Jin Oh, Ewha Womans University, Seoul