defn: Opposite of product category is product of opposites#575
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jajaperson wants to merge 2 commits intothe1lab:mainfrom
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defn: Opposite of product category is product of opposites#575jajaperson wants to merge 2 commits intothe1lab:mainfrom
jajaperson wants to merge 2 commits intothe1lab:mainfrom
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ncfavier
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Dec 29, 2025
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Per suggestion of @plt-amy on discord.
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I am going to close this for now while I implement some related stuff. I also think I might rename the module to duality to more closely mirror e.g. http://1lab.dev/Cat.Instances.Functor.Duality.html |
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Description
This adds a proof that for any precategories
CandD, we have(C ×ᶜ D)^op ≡ C ^op ×ᶜ D ^op.Checklist
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