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arXiv · 1901.10707

The Gray monoidal product of double categories

Gabriella Böhm
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Abstract

The category of double categories and double functors is equipped with a symmetric closed monoidal structure. For any double category $\mathbb A$, the corresponding internal hom functor $|[ \mathbb A,-]|$ sends a double category $\mathbb B$ to the double category whose 0-cells are the double functors $\mathbb A \to \mathbb B$, whose horizontal and vertical 1-cells are the horizontal and vertical pseudotransformations, respectively, and whose 2-cells are the modifications. Some well-known functors of practical significance are checked to be compatible with this monoidal structure.

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Gabriella Böhm. 2019-01-30. The Gray monoidal product of double categories. https://arxiv.org/abs/1901.10707

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