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SUMMARY:Towards higher dimensional analogues of the torsor of Drinfeld's a
 ssociators - Fresse\, B (Universit Lille 1)
DTSTART:20130408T123000Z
DTEND:20130408T133000Z
UID:TALK44378@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:The purpose of this talk is to give a description of the set o
 f homotopy classes of formality quasi-isomorphisms for a Sullivan model of
  the Little n-discs operads\, where we consider any n>1.\n\nThe Sullivan m
 odel of a topological operad combines a commutative dg-algebra structure\,
  reflecting the rational homotopy of the spaces underlying the operad\, an
 d a cooperad structure\, reflecting the composition structures of the oper
 ad. I will explain the definition of an obstruction spectral sequence for 
 the formality of these Sullivan models of operads.\n\nI will give a descri
 ption of the obstruction spectral sequence associated to the little discs 
 operads\, and I will explain the connection with the definition of the Dri
 nfeld associators.\n \n
LOCATION:Seminar Room 1\, Newton Institute
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