Tue, 25 Nov 2025
14:00
C4

TBA

Omid Ebrahimi
(Department of Experimental Psychology, University of Oxford)
Abstract

TBA

Tue, 04 Nov 2025
14:00
C4

TBA

Lena Mangold
(Centre Marc Bloch, Berlin and EHESS, Paris)
Abstract

TBA

Tue, 28 Oct 2025
14:00
C4

Dynamic Models of Gentrification

Nicola Pedreschi
(University of Bari)
Abstract
The phenomenon of gentrification of an urban area is characterized by the displacement of lower-income residents due to rising living costs and an influx of wealthier individuals. This study presents an agent-based model that simulates urban gentrification through the relocation of three income groups — low, middle, and high — driven by living costs. The model incorporates economic and sociological theories to generate realistic neighborhood transition patterns. We introduce a temporal network-based measure to track the outflow of low-income residents and the inflow of middle- and high-income residents over time. Our experiments reveal that high-income residents trigger gentrification and that our network-based measure consistently detects gentrification patterns earlier than traditional count-based methods, potentially serving as an early detection tool in real-world scenarios. Moreover, the analysis highlights how city density promotes gentrification. This framework offers valuable insights for understanding gentrification dynamics and informing urban planning and policy decisions.
Tue, 28 Oct 2025

14:00 - 15:00
L4

Erdős–Hajnal and VC-dimension

Tung Nguyen
(University of Oxford)
Abstract

A 1977 conjecture of Erdős and Hajnal asserts that for every hereditary class of graphs not containing all graphs, every graph in the class has a polynomial-sized clique or stable set. Fox, Pach, and Suk and independently Chernikov, Starchenko, and Thomas asked whether this conjecture holds for every class of graphs of bounded VC-dimension. In joint work with Alex Scott and Paul Seymour, we resolved this question in the affirmative. The talk will introduce the Erdős–Hajnal conjecture and discuss some ideas behind the proof of the bounded VC-dimension case.

Quantifying digital habits
 Sharpe, M Bowen, M Lambiotte, R EPJ Data Science volume 14 issue 1 (30 Sep 2025)

Short Stories 2

When you next go swimming, take some maths with you. And don't worry, maths is waterproof. Nathan Creighton is in at the deep end.

Short Stories 1

Quick, quicker, less quick. Amandine Aftalion describes the trajectory of a 100m runner in this clip from her Oxford Mathematics Public Lecture.

Remarks on the Higgs branch of 5d conformal matter
 De Marco, M Del Zotto, M Grimminger, J Sangiovanni, A Journal of High Energy Physics volume 2025 issue 10 144 (16 Oct 2025)
The case for using flexible healthcare capacity constraints to optimise pandemic control strategies
 Doyle, N Cumming, F Finnie, T West, M Thompson, R Tildesley, M (10 Oct 2025)
Intermittent attachments form three-dimensional cell aggregates with emergent fluid properties
 Panigrahi, D Celora, G Ford, H Insall, R Bhat, R Manhart, A Pearce, P (26 Sep 2025)
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