Spherical category

In category theory, a branch of mathematics, a spherical category is a pivotal category (a monoidal category with traces) in which left and right traces coincide.[1] Spherical fusion categories give rise to a family of three-dimensional topological state sum models (a particular formulation of a topological quantum field theory), the Turaev-Viro model, or rather Turaev-Viro-Barrett-Westbury model.[2]


  1. John W. Barrett, Bruce W. Westbury (1999). "Spherical Categories". Advances in Mathematics. 143 (2): 357–375. arXiv:hep-th/9310164. doi:10.1006/aima.1998.1800.CS1 maint: uses authors parameter (link)
  2. "Turaev-Viro model". nLab. Retrieved 7 August 2017.

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