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15 votes

What's the right way to think about "anomalies" in 3d TQFTs?

There are several different kinds of TQFTs that can be defined. For example there are oriented theories, unoriented theories, framed theories, and many more. The 3D TQFTs coming from Modular Tensor Ca …
Chris Schommer-Pries's user avatar
4 votes

Internal Hom of Deligne' tensor product

That equation is not correct. You should be suspicious because the definition of the $\mathcal{C}$-module category structure on $\mathcal{M} \boxtimes \mathcal{N}$ doesn't use the $\mathcal{C}$-module …
Chris Schommer-Pries's user avatar
23 votes
5 answers
3k views

Do all 3D TQFTs come from Reshetikhin-Turaev?

The Reshetikhin-Turaev construction take as input a Modular Tensor Category (MTC) and spits out a 3D TQFT. I've been told that the other main construction of 3D TQFTs, the Turaev-Viro State sum constr …
Chris Schommer-Pries's user avatar
9 votes
2 answers
444 views

How weird can Modular Tensor Categories be over non-algebraically closed fields?

I am trying to understand better the behaviour and character of modular tensor categories over non-algebraically closed fields. How weird can they be? The reason I am interested in this is that my co …
Chris Schommer-Pries's user avatar