On Examples and Classification of Frobenius Objects in Rel
Abstract
We give some new examples of Frobenius objects in the category of sets and relations Rel. One example is a groupoid with a twisted counit. Another example is the set of conjugacy classes of a group. We also classify Frobenius objects in Rel with two or three elements, and we compute the associated surface invariants using the partition functions of the corresponding TQFTs.
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