### Strings, Fields, Topology in Oberwolfach

#### Posted by Urs Schreiber

This week’s workshop at MFO is on *Strings, Fields, Topology*. We started collecting notes and other material at

Oberwolfach Workshop, June 2009 – Strings, Fields Topology .

This includes today

- Christoph Schweigert and Ingo Runkel on [[CFT]] and algebra in modular tensor categories;

- Dan Freed on [[differential cohomology]] of [[string theory]] [[background fields]];

- Kevin Costello on quantum field theory in terms of [[factorization algebras]].

Posted at June 8, 2009 11:30 PM UTC
## Tuesday

I have added to [[Oberwolfach Workshop, June 2009 – Strings, Fields, Topology]] today’s talk notes (Tuesday, June 9) on

- Ulrich Bunke and Thomas Schick lecturing on their models for [[differential cohomology]] and in particular differential K-theory

- after that we heard part II and III of Kevin Costello’s lectures on his work on quantum field theory, in terms of [[BV-theory]] and [[factorization algebras]]

This is impressive stuff. The notes on the $n$Lab can hardly convey the full picture here. You are supposed to switch to reading his book on renormalization, too:

Kevin Costello,

Renormalization and the Batalin-Vilkovisky formalism(web)This is important stuff. Read it.