Number Theory Down Under 9 (NTDU9)
Start Date
September 27, 2021
End Date
September 30, 2021
Organizer
University of SydneyLocation
OnlineContact Info
Dzmitry Badziahin (University of Sydney), Alexander Fish (University of Sydney)
Registration
Open

This is the ninth annual event of Number Theory Down Under, a meeting which promotes Number Theory in Australia. It brings together Australian and international number theorists to share ideas, pursue collaborative work and establish connections to other fields of mathematics such as Additive combinatorics, Ergodic Theory and Homogeneous Dynamics, Arithmetic Geometry, Arithmetic Dynamical Systems, as well as more applied areas, such as Cryptography.
The main objective of the conference is to develop coherent plans for future development of Number Theory in Australia and its impact on other fields, and thus gaining a better understanding of the possibilities for further progress.
The conference would provide leading number theorists, early career researchers (ECRs) and students an ideal opportunity to interact, to present their recent results and to work on concrete research problems. We will have distinguished plenary speakers from Australia and overseas and Australian and NZ keynote speakers. There will also be sessions for contributed talks, as well as dedicated sessions for students to present short updates on their research.
The presentation and discussion of open problems have been a major component of the conference in previous years. Attendees have set challenges to one another during talks at the conference: this has led to the publication of articles and an increase in collaboration. While “Number Theory”, as a Special Interest Group within the AustMS, is still at its formative stage, its membership is increasing each year. This reflects the growing (though still small) number of academics in the Australian community. NTDU9 will enable members of this burgeoning group to present their most recent work and to collaborate on open problems. One of the main goals of the conference this year will also be to search for new links between Number Theory and other areas of mathematics.
Plenary Speakers
- David Harvey (UNSW) — Recent progress on deterministic integer factorisation – Talk recording
- Dimitris Koukoulopoulos (U Montreal) — Approximating reals by rationals – Talk recording
- Amir Mohammadi (UCSD) — Finitary analysis in homogeneous spaces and applications – Talk recording
- Alina Ostafe (UNSW) — Dynamical irreducibility of polynomials modulo primes – Talk recording
- Terence Tao (UCLA) — Approximants for Classical Arithmetic Functions – Talk recording
- Ole Warnaar (UQ) — Cylindric partitions and character identities – Talk recording
Best Student Talk Prize
- First Prize: James Evans (Newcastle) — Regular Sequences, Riesz Products and Ergodicity
- Second Prize: Madeleine Kyng (UNSW) — A new algorithm for computing zeta functions of algebraic curves
Program
- General information:
- The conference spans three days, from 27 Sept to 29 Sept.
- Each day, there are two plenary talks at 9am and 1:30pm (AEST time), followed by four contributed talks.
- All talks are conducted via Zoom. Registered participants will receive a link to talks one-two days before the conference.
Detailed Conference schedule
The list of titles and abstracts.
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