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Deformation Theory Seminar

Wednesday, November 20, 2013 - 2:00pm

Ralph Kaufmann

Purdue and IAS

Location

University of Pennsylvania

DRL 2C8

After briefly giving the definition of Feynman categories -a toy example being finite sets and surjections- we will consider other algebraic structures that can be derived for them. The first are universal operations, the probably most known example being the Gerstenhaber structure for Hochschild cochains. The second type of structure are Hopf algebras. Examples here include the Hopf algebras of Connes--Kreimer, Goncharov and Baues.