# 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 2 to 3pm.

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

Yang Zhang

Ole Warnaar

Ramiro Lafuente

### 3D index and Dehn surgeries

16 April 2024 2:00pm–3:00pm

Speaker: Daniele Celoria

Affiliation: University of Queensland

Affiliation: University of Queensland

### A compactification trick for the rigidity case of the positive mass theorem

10 April 2024 10:00am–11:00am

Speaker: Lawrence Lo

Affiliation: University of Münster

Affiliation: University of Münster

### Templerley-Lieb algebra at roots of unity

26 March 2024 2:00pm–3:00pm

Speaker: Jieru Zhu

Affiliation: University of Queensland

Affiliation: University of Queensland

### Toral symmetries of collapsed ancient solutions to the homogeneous Ricci flow

21 March 2024 3:00pm–4:00pm

Speaker: Francesco Pediconi

Affiliation: Università di Firenze

Affiliation: Università di Firenze

### The probability of non-existence of small substructures via clusters and cumulants

8 March 2024 11:00am–12:00pm

Speaker: Dr. Rui Zhang

Affiliation: Universitat Pompeu Fabra

Affiliation: Universitat Pompeu Fabra

### What is a robust cycle between hyperbolic ergodic measures? How? For what?

20 February 2024 2:00pm–3:00pm

Speaker: Lorenzo Diaz

Affiliation: PUC-Rio

Affiliation: PUC-Rio

### Multivariable knot polynomials from braided Hopf algebras with automorphisms

16 January 2024 2:00pm–3:00pm

Speaker: Professor Stavros Garoufalidis

Affiliation: Southern University of Science and Technology Shenzhen, China

Affiliation: Southern University of Science and Technology Shenzhen, China

### The equivariant Euler characteristic of the Milnor fibre

11 December 2023 2:00pm–3:00pm

Speaker: Gus Lehrer

Affiliation: University of Sydney

Affiliation: University of Sydney

### A Deligne-Simpson problem for irregular G-connections over P^1

10 October 2023 2:00pm–3:00pm

Speaker: Dr Konstantin Jakob

Affiliation: Technische Universitat Darmstadt

Affiliation: Technische Universitat Darmstadt

### Mahler measures at work

22 August 2023 2:00pm–3:00pm

Speaker: Wadim Zudilin

Affiliation: Nijmegen

Affiliation: Nijmegen

### Introduction to the Theory of Newton{Okounkov Bodies

21 August 2023 2:00pm–3:00pm

Speaker: Professor Askold Khovanskii

Affiliation: University of Toronto

Affiliation: University of Toronto

### Deligne-Simpson problem and roots systems

15 August 2023 3:00pm–4:00pm

Professor Emmanuel Lettellier

Universite Denis-Diderot (Paris 7)

Universite Denis-Diderot (Paris 7)

### Polynomially many genus g surfaces in a hyperbolic 3-manifold

8 August 2023 3:00pm–4:00pm

Speaker: Anastasiia Tsvietkova, Assistant Professor

Affiliation: Rutgers University

Affiliation: Rutgers University

### Isoperimetric type inequalities in geometry and algebra

1 August 2023 3:00pm–4:00pm

Speaker: Professor Askold Khovanskii

Affiliation: University of Toronto

Affiliation: University of Toronto

### Non-extendable partial Latin Hypercubes and Maximal orthogonal partial Latin Squares

25 July 2023 3:00pm–4:00pm

Speaker: Professor E. Sule Yazıcı

Affiliation: Koc¸ University

Affiliation: Koc¸ University

### Invariant SKT structures on nilmanifolds

11 July 2023 3:00pm–4:00pm

Speaker: Romina M. Arroyo

Affiliation: UN Córdoba

Affiliation: UN Córdoba

### Latin trades derived from Latin square automorphisms, autotpisms and autoparatopisms

27 June 2023 3:00pm–4:00pm

Speaker: Nick Cavenagh

Affiliation: University of Waikato, NZ

Affiliation: University of Waikato, NZ

### Orthogonal and Symplectic Dirac operators

28 March 2023 3:00pm–4:00pm

Speaker: Stepan Hudecek

Affiliation: University of Queensland

Affiliation: University of Queensland

### How to define the Fourier transform on Heisenberg groups

24 January 2023 3:00pm–4:00pm

Sundaram Thangavelu

Indian Institute of Science

Indian Institute of Science

### Curvature and Moduli -- Some Intimations and Propaganda

1 November 2022 3:00pm–4:00pm

Speaker: Kyle Broder

Affiliation: University of Queensland

Affiliation: University of Queensland

### Recent progress on the curvatures of Gauduchon connections

18 October 2022 3:00pm–4:00pm

Speaker: James Stanfield

Affiliation: University of Queensland

Affiliation: University of Queensland

### Milnor fibres, noncrossing partitions and noncrossing algebras

6 September 2022 3:00pm–4:00pm

Speaker: Yang Zhang

Affiliation: University of Queensland

Affiliation: University of Queensland

### The Double Elliptic Integrable System

19 August 2022 2:00pm–3:00pm

Peter Koroteev

University of California, Berkeley

University of California, Berkeley

### Row-column factorial designs of strength at least 2

2 August 2022 2:00pm–3:00pm

Nicholas Cavenagh

University of Waikato, New Zealand

University of Waikato, New Zealand

### Schubert calculus, TASEP, and free fermions

20 May 2022 2:00pm–3:00pm

Travis Scrimshaw

Osaka Metropolitan University, Japan

Osaka Metropolitan University, Japan

### Schubert calculus and quantum integrability

16 February 2021 3:00pm–4:00pm

Professor Paul Zinn-Justin

University of Melbourne

University of Melbourne

### K-pop and 2-avoidance

4 November 2020 3:00pm–4:00pm

Professor Murray Elder

University of Technology Sydney

University of Technology Sydney

### Carmichael and Lehmer numbers and the analogous polynomials

10 March 2020 3:00pm–4:00pm

Max Lewis

University of Queensland (PhD exit seminar)

University of Queensland (PhD exit seminar)

### Quasisymmetric Hopf algebras for K-theory

3 March 2020 3:00pm–4:00pm

Eric Marberg (Hong Kong University of Science and Technology)

### Edge-following topological states

25 February 2020 3:00pm–4:00pm

Matthias Ludewig, University of Adelaide, SA

### An overiew of loop varieties

4 February 2020 3:00pm–4:00pm

Professor Ales Drapal (Charles University)

### A fully nonlinear flow of three-convex hypersurfaces

28 November 2019 11:00am–12:00pm

Mr Stephen Lynch (University of Tübingen, Germany)

### The Oberwolfach Problem and its variants

26 November 2019 3:00pm–4:00pm

Dr Andrea Burgess (University of New Brunswick, Canada)

### Relating p-adic groups and quantum groups

22 October 2019 3:00pm–4:00pm

Dr Valentin Buciumas (The University of Queensland)

### 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