DPhil Prize winners

Congratulations  to:

Monika Kudlinska, for her transformative ideas showing how free-by-cyclic groups are much more badly behaved than fundamental groups of 3–manifolds, while also providing a collection of tools for their study which will have a lasting impact on the field.

Philipp Jettkant, for his versatility, great intuition and technical skill, including the use of sophisticated numerical algorithms, to address novel mean field problems with theoretical developments which will be of much wider interest.

Volunteers wanted for Typhoid and Paratyphoid A Fever vaccine study

If you are aged 18 to 55 years old, and in good health, you may be eligible to take part in the BiVISTA study to find a vaccine against typhoid and paratyphoid A fever.

Participants will be vaccinated with the new vaccine or control, and then exposed to the bacteria that causes paratyphoid fever. All study participants will receive antibiotic treatment.

All participants will be reimbursed up to £4585 for their time, inconvenience, and travel.

Jobs in Oxford Mathematics

Three College Vacancies:

Stipendiary Lecturership in Applied Mathematics at Wadham College

Stipendiary Lecturer in Mathematics at St Edmund Hall

Stipendiary Lecturership in Mathematics at Christ Church College

Full details

And we're also recruiting a Graduate Studies Officer to work with our fab grads and colleagues in Academic Administration.

Full details

Wanted: student ambassadors

Saïd Business School is recruiting student ambassadors to deliver a suite of short summer courses for ambitious young learners. A range of roles are available across the summer, with accommodation in Oxford provided. Full details are available here.

Image: The Ambassadors - Hans Holbein the Younger

Effects of individual variation and seasonal vaccination on disease risks
 Hart, W Amin, J Park, H Kitagawa, K Jeong, Y Kaye, A Iwami, S Thompson, R (03 Apr 2025)
A simulation modeling framework for fluid motion and transport in a rocking bioreactor with application to cultivated meat production
 Kim, M Harris, D Cimpeanu, R (07 Apr 2025)
On Inverse Problems for Two-Dimensional Steady Supersonic Euler Flows past Curved Wedges
 Chen, G Pu, Y Zhang, Y Inverse Problems (04 Apr 2025)
Uncovering flow and deformation regimes in the coupled fluid-solid
vestibular system
 Chico-Vázquez, J Moulton, D Vella, D (08 Apr 2025) http://arxiv.org/abs/2504.06394v1
Localization of deformation in the central hub of hub-and-spoke kirigami
 Barckicke, J Domino, L Zhang, Q Liu, M Vella, D (09 Apr 2025) http://arxiv.org/abs/2504.06626v1
Wed, 18 Jun 2025
16:00
L6

Profinite Rigidity: Then and Now

Julian Wykowski
(University of Cambridge)
Abstract

Is it possible to tell the isomorphism type of an infinite group from its collection of finite quotients? This question, known as profinite rigidity, has deep roots in various areas of mathematics, ranging from arithmetic geometry to group theory. In this talk, I will introduce the question, its history and context. I will explain how profinite rigidity is studied using the machinery of profinite completions, including elementary proofs and counterexamples. Then I will outline some of the key results in the field, ranging from 1970 to the present day. Time permitting, I will elaborate on recent results of myself on the profinite rigidity of certain classes of solvable groups. 

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