Weekly bulletin - next week

Find out what's happening next week at MSI.

31
Jul

Sea^2 = Play^2 + Me^2

  • Thursday, 31 Jul 2025, 5:30 - 6:30pm

  • Seminar Room 1.33 & 1.37

    Mathematical Sciences Institute

    ANU College of Science

    Hanna Neumann Building #145, Science Road

    The Australian National University

    Canberra ACT 2600

  • Jordan Pitt (University of Sydney)

Join us for a public lecture from Senior Lecturer and Associate Dean Indigenous Strategy & Services Jordan Pitt (University of Sydney and Australian National University Alumni). Light refreshments will be served afterwards.

Abstract

Every time I mention that I’m a mathematician to someone new, the most popular response is ‘Oh I was TERRIBLE at maths!' and a general vibe that I’m extremely strange for not sharing in this feeling. Honestly, as mathematicians, we are a bit different, but I am going to try and explain why we’re not that strange in this talk. To do this I will provide some stories of my own mathematical journey and why I ended up loving it. 

About the speaker

Jordan is a descendant of the Birri Gubba people, Associate Dean of Indigenous Strategy and Services and Applied Mathematician at the University of Sydney. He completed his PhD at the Australian National University in 2019 developing methods to model the inundation caused by tsunamis and storm surges. His current research, begun as a post-doctoral researcher at the University of Adelaide focuses on modelling the interaction between ocean waves and sea ice, which forms as the ocean’s surface freezes. This interaction influences the annual growth and melt of sea ice, which is a key indicator and driver of the Earth’s climate.

29
Jul

Solving QQ-Systems via Tropical Geometry

  • Tuesday, 29 Jul 2025, 3 - 4pm

  • Room 1.33, Hanna Neumann Building #145 & on zoom - link TBC

  • Rahul Singh (Louisiana State University)
Abstract:
Certain systems of polynomial equations, known as QQ-systems, appear in surprising corners of geometry and mathematical physics — from the enumerative geometry of quiver varieties to aspects of the (deformed) geometric Langlands program. They also arise in the study of quantum integrable models of spin chain type, linked to quantum groups and Yangians. Specifically, the solutions to the QQ-system equations characterize the spectrum of these integrable models via the so-called Bethe ansatz equations. In this talk, I will give an introduction to quantum groups and integrable models, illustrated by the familiar example of Heisenberg spin chains. I will then explain how methods from tropical geometry − a combinatorial shadow of algebraic geometry − can be effectively used to construct and analyze solutions to QQ-systems. This is a joint work with Anton Zeitlin

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