Cafe PiPipp & Co Doughnuts - every Thursday from 30 April, only £3 each:

  • Cinnamon & Brown Sugar 
  • Mixed Berry Jam
  • Belgian Chocolate
  • Madagascan Vanilla Custard
  • Sicilian Lemon Curd

Cinco de Mayo – Tuesday 5 May

A clip from James Maynard's Sophie Germain Oxford Mathematics Public Lecture held at the Royal Institution on 1 April, Sophie's 250th. You can watch all five talks - our own Lukas Brantner, Ana Caraiani, Laura Monk and a Chladni figures demonstration by Dan Plane as well as James- here

You may have noticed we are running a series of short films on the maths behind popular games (card, board, digital, nothing is off limits). So we want contributors for the following games plus any ideas you have of your own.

Poker, Blackjack, Roulette, Chess, Go, Bridge, Monopoly, Tsuro, Carcasonne, Cathedral, Minecraft, Catan, Ticket to Ride, Saboteur, Projective Noughts and Crosses, Projective Set, Splendour, Minesweeper, Backgammon, etc.

AWBIt's the Week 1 Student Bulletin! 

We hope you've settled back into Oxford life, and have managed to enjoy the sunshine this week! 

Read on for Café π news, a call for board game players, and next week's Fridays@2 session.

A clip from James Maynard's Sophie Germain Oxford Mathematics Public Lecture, one of five talks celebrating Sophie's life, work and influence held at the Royal Institution on 1 April, Sophie's 250th. You can watch all five talks - our own Lukas Brantner, Ana Caraiani, Laura Monk and a Chladni figures demonstration by Dan Plane as well as James - here

Mon, 08 Jun 2026
15:30
L5

Dehn Surgery and Algorithms

Misha Schmalian
((Mathematical Institute University of Oxford))
Abstract

Dehn Surgery is an operation on 3-manifolds that is ubiquitous in the field of low-dimensional topology. Concretely, given a link L in a 3-manifold N, Dehn surgery produces many new 3-manifolds. A classical result of Lickorish-Wallace states that from one fixed 3-manifold N one can obtain all other 3-manifolds by Dehn surgery using some link in N. However it remains unclear, in general, which manifolds can be obtained by Dehn surgery using a fixed manifold N and a fixed link L. I will discuss how one can algorithmically decide this question and then discuss applications of this algorithm. 

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