Mathematical Sciences Research Institute

Home » Workshop » Schedules » Sullivan's conjecture and applications to arithmetic

Sullivan's conjecture and applications to arithmetic

Reimagining the Foundations of Algebraic Topology April 07, 2014 - April 11, 2014

April 07, 2014 (04:10 PM PDT - 05:00 PM PDT)
Speaker(s): Kirsten Wickelgren (Duke University)
Location: 60 Evans Halls, UC Berkeley
Primary Mathematics Subject Classification No Primary AMS MSC
Secondary Mathematics Subject Classification No Secondary AMS MSC
No Video Uploaded

One can phrase interesting objects in terms of fixed points of group actions. For example, class numbers of quadratic extensions of Q can be expressed with fixed points of actions on modular curves. Derived functors are frequently better behaved than their non-derived versions, so it is useful to consider the associated derived functor, called the homotopy fixed points. Sullivan's conjecture is an equivalence between appropriately completed spaces of fixed points and homotopy fixed points for finite p-groups. It was proven independently by H. Miller, G. Carlsson, and J. Lannes. This talk will present Sullivan's conjecture and its solutions, and discuss analogues for absolute Galois groups conjectured by Grothendieck.

20456?type=thumb Wickelgren.Notes 80.5 KB application/pdf Download
Video/Audio Files
No Video Files Uploaded