Feynman categories: Universal operations and Hopf algebras

Thursday, October 31, 2013 -
3:00pm to 4:00pm
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.
Speaker: 
Ralph Kaufmann
IAS
Event Location: 
Fine Hall 214