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arXiv · 0712.1864

On endomorphism algebras of separable monoidal functors

Brian Day·Craig Pastro
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Abstract

We show that the (co)endomorphism algebra of a sufficiently separable "fibre" functor into Vect_k, for k a field of characteristic 0, has the structure of what we call a "unital" von Neumann core in Vect_k. For Vect_k, this particular notion of algebra is weaker than that of a Hopf algebra, although the corresponding concept in Set is again that of a group.

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Brian Day, Craig Pastro. 2007-12-12. On endomorphism algebras of separable monoidal functors. https://arxiv.org/abs/0712.1864

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