[Merged by Bors] - feat(category_theory/limits/types): explicit description of equalizers in Type #4880
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b-mehta
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Very nice! I think this is a worthwhile addition -- given that are are currently limited to sheaves of types, it's good to get some tools which can handle conditions related to sheaves of types like being an equalizer. |
jcommelin
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…s in Type (#4880) Cf https://leanprover.zulipchat.com/#narrow/stream/217875-Is-there.20code.20for.20X.3F/topic/concrete.20limits.20in.20Type. Adds equivalent conditions for a fork in Type to be a equalizer, and a proof that the subtype is an equalizer. (cc: @adamtopaz @kbuzzard)
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Cf https://leanprover.zulipchat.com/#narrow/stream/217875-Is-there.20code.20for.20X.3F/topic/concrete.20limits.20in.20Type.
Adds equivalent conditions for a fork in Type to be a equalizer, and a proof that the subtype is an equalizer.
(cc: @adamtopaz @kbuzzard)