The 2-categorical universal property of the optic construction

Let SymmMonCathomcore\mathbf{SymmMonCat}_\mathrm{homcore} be the sub-2-category of symmetric monoidal categories whose 2-morphisms are natural isomorphisms, and let Tele\mathbf{Tele} be the 2-category of teleological categories, functors, and teleological natural isomorphisms. Write Optic\mathbf{Optic} for the optic construction and ()d(-)_d for the underlying dualisable-morphisms functor.

Optic biadjunction conjecture. The functor

Optic:SymmMonCathomcoreTele\mathbf{Optic}: \mathbf{SymmMonCat}_\mathrm{homcore} \to \mathbf{Tele}

is left biadjoint to

()d:TeleSymmMonCathomcore.(-)_d: \mathbf{Tele} \to \mathbf{SymmMonCat}_\mathrm{homcore}.

The preceding strict universal property establishes the analogous ordinary adjunction for strict monoidal categories. This conjectural extension would provide the corresponding 2-categorical universal property for non-strict monoidal categories, restricted to natural isomorphisms.

Sources & referencesView supporting material

Primary source

Mitchell Riley, “Categories of Optics”, arXiv:1809.00738 (2018).

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