Wed, 25 Jun 2025
15:00

Boundary cubulation is a pathway to residual finiteness

Thomas Ng
(Brandeis University)
Abstract

Actions on CAT(0) cube complexes are powerful geometric tool for both algebraically decomposing groups and establishing subgroup separability results.  I will describe boundaries associated to hyperbolic and relatively hyperbolic groups. With a focus on (quotients of) free products, I will discuss variations on a boundary criteria of Bergeron—Wise for exhibiting cocompact actions on CAT(0) cube complexes.  I will explain some ideas on how to use these tools to show that most (small-cancellation or random density) quotients of free products preserve residual finiteness. This is based on multiple joint works with subsets of Einstein, Krishna MS, Montee, and Steenbock.

Optimal Execution and Speculation With Trade Signals
 Bank, P Cartea, A Koerber, L Finance and Stochastics
Thu, 27 Nov 2025
14:00

TBA

Alena Kopanicakova
(University of Toulouse)
Abstract

TBA

Diffusive dynamics and electrochemical regulation of weak polyelectrolytes across liquid interfaces
 Celora, G Blossey, R Muench, A Wagner, B Physical Review Research

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Equali-Tea on 1 July

The Interim Head of the Equality and Diversity Unit, Marilyn Verghis, is delighted to invite staff and students to an Equali-tea on Tuesday, 1 July from 10.30-11.30am. The tea will be hosted by the Department of Statistics, 24-29 St Giles.

Staff briefings on congestion charge proposals

An online staff briefing on proposals for a temporary congestion charge in Oxford have been arranged with the County Council. This will take place at 11.30am-12.30pm on Monday 30 June. Colleagues interested in the proposals and their potential impact are welcome to join using the Teams links provided.

Help shape how the University communicates with staff

Following a University-wide communications survey in January 2025, the Internal Communications team is inviting staff to take part in follow-up discussion groups or share their views through a short, anonymous questionnaire during July. The aim is to gather more nuanced feedback that will help shape how the University communicates with staff in the future.

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