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University of Cambridge > Talks.cam > Isaac Newton Institute Seminar Series > Towards higher dimensional analogues of the torsor of Drinfeld's associators

## Towards higher dimensional analogues of the torsor of Drinfeld's associatorsAdd to your list(s) Download to your calendar using vCal - Fresse, B (Universit Lille 1)
- Monday 08 April 2013, 13:30-14:30
- Seminar Room 1, Newton Institute.
If you have a question about this talk, please contact Mustapha Amrani. Grothendieck-Teichmller Groups, Deformation and Operads The purpose of this talk is to give a description of the set of homotopy classes of formality quasi-isomorphisms for a Sullivan model of the Little n-discs operads, where we consider any n>1. The Sullivan model of a topological operad combines a commutative dg-algebra structure, reflecting the rational homotopy of the spaces underlying the operad, and a cooperad structure, reflecting the composition structures of the operad. I will explain the definition of an obstruction spectral sequence for the formality of these Sullivan models of operads. I will give a description of the obstruction spectral sequence associated to the little discs operads, and I will explain the connection with the definition of the Drinfeld associators. This talk is part of the Isaac Newton Institute Seminar Series series. ## This talk is included in these lists:- All CMS events
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