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Differential Tannakian categories and fiber functors

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If you have a question about this talk, please contact Mustapha Amrani.

Discrete Integrable Systems

We define a differential Tannakian category (without using fiber fubctors) and show that under a natural assumption it has a fiber functor. If in addition this category is neutral, that is, the target category for the fiber functor are finite dimensional vector spaces over the base field, then it is equivalent to the category of representations of a (pro-)linear differential algebraic group. Our approach generalises Delignes fiber functor construction for the usual Tannakian categories.

This talk is part of the Isaac Newton Institute Seminar Series series.

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