Topology Seminar: Christian Kassel (CNRS & University of Strasbourg)

  • Date: 05/10/2011
  • Time: 16:00
Location: 

University of British Columbia

Topic: 

A continuous non-abelian one-cocycle with palindromic values

Description: 

Using a group of automorphisms of the free group F_2 isomorphic to the braid group B_3, we construct a non-abelian one-cocycle P: F_2 --> F_2, which turns out to take palindromic values and to be continuous for the profinite topology on F_2. We  characterize the elements of the image of the map P and use B_3 to express the relation between elements having the same image. (Joint work with Christophe Reutenauer, UQAM.)

Schedule: 

WMAX 110

Sponsor: 

pims