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Strict monoidal categories lack coherence laws #753

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anuyts opened this issue Mar 29, 2022 · 0 comments
Open

Strict monoidal categories lack coherence laws #753

anuyts opened this issue Mar 29, 2022 · 0 comments

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@anuyts
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anuyts commented Mar 29, 2022

In Cubical.Categories.Monoidal.Base, there is a type MonoidalStr of non-strict monoidal structures and a type StrictMonStr of strict ones. One would expect the following results:

  • Strict structures give rise to non-strict ones
  • For univalent categories, this is an isomorphism.

However, I think the first result doesn't even hold (unless your object type is a set) as the strict structure lacks coherence laws.

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