Please note that the list below only shows forthcoming events, which may not include regular events that have not yet been entered for the forthcoming term. Please see the past events page for a list of all seminar series that the department has on offer.

 

Past events in this series


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.

Thu, 23 Oct 2025
16:00
Lecture Room 4

TBA

Xiangqian Yang
(Peking University)
Tue, 04 Nov 2025
16:00
TBA

TBA

Sean Hartnoll
(DAMTP Cambridge)
Further Information

Joint seminar organised by the Random Matrix Theory group. Note this seminar is on a TUESDAY.

Abstract

TBA. 

Thu, 13 Nov 2025
16:00
Lecture Room 4

TBA

Thomas Bloom
(Manchester)
Abstract

TBA

Thu, 27 Nov 2025
16:00
Lecture Room 4

TBA

Dmitri Whitmore
(University of Cambridge)
Thu, 04 Dec 2025
16:00
Lecture Room 4

TBA

Elvira Lupoian
(University College London)