A Bayesian model for repeated cross-sectional epidemic prevalence survey data
Steyn, N Chadeau-Hyam, M Elliott, P Donnelly, C PLoS Computational Biology
Moduli stacks of Galois representations and the p-adic local Langlands correspondence for GL_2(Q_p)
Johansson, C Newton, J Wang-Erickson, C Compositio Mathematica
Gremban Expansion for Signed Networks: Algebraic and Combinatorial Foundations for Community-Faction Detection
Diaz-Diaz, F Devriendt, K Lambiotte, R (17 Sep 2025)

What's everyone like round here? Do they have fun? 

Films about people who also do maths.

The Monty Hall Problem with Becky Crossley. Blew a few minds on social media. There's a longer version with the maths here.

Centrifugal-mirror confinement with strong azimuthal magnetic field
Stoltzfus-Dueck, T Parra, F Plasma Physics and Controlled Fusion volume 67 issue 9 095025 (30 Sep 2025)
Wed, 15 Oct 2025
16:00
L4

Pointwise bounds for 3-torsion (note: Wednesday)

Stephanie Chan
(UCL)
Abstract

For $\ell$ an odd prime number and $d$ a squarefree integer, a notable problem in arithmetic statistics is to give pointwise bounds for the size of the $\ell$-torsion of the class group of $\mathbb{Q}(\sqrt{d})$. This is in general a difficult problem, and unconditional pointwise bounds are only available for $\ell = 3$ due to work of Pierce, Helfgott—Venkatesh and Ellenberg—Venkatesh. The current record due to Ellenberg—Venkatesh is $h_3(d) \ll_\epsilon d^{1/3 + \epsilon}$. We will discuss how to improve this to $h_3(d) \ll d^{0.32}$. This is joint work with Peter Koymans.

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