Schedule May 18, 2006
Planar Feynman-type Diagrams for Invariant Tensors
Greg Kuperberg (UC Davis)

I will review a skein-theoretic construction of the invariants of rank 1 and rank 2 Lie algebras, and their quantum-group counterparts, as pivotal categories. These categories are also known in physics as spin networks, and as particle fusion with F matrices. The talk title is explained by the fact that generalized spin networks are essentially the same as Feynman diagrams in 0+0-dimensional quantum physics.

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