What is the enriched Yoneda lemma?
The enriched Yoneda lemma generalizes the standard Yoneda lemma to enriched categories, where morphisms are elements of a monoidal category rather than just sets. It states that the object of enriched natural transformations from Hom_X to F is isomorphic, as an object of the enriching category, to .
Conditions
- The setting is enriched category theory.
- Hom_X denotes the representable functor at X.
- F is a functor in the same enriched context.
Reasoning, step by step
- Identify the enriched category context.
- Consider the enriched natural transformations from Hom_X to F.
- Conclude that this object is isomorphic to in the enriching category.
Example
The speaker states: 'the set of enriched natural transformations from Hom X to F is isomorphic as an object, e.g. a topological space, to F of X.'
Common misconceptions
- Thinking the enriched Yoneda lemma only applies to sets.
- Assuming the isomorphism is always a set-theoretic bijection.
Watch the explanation
YouTubeThe Yoneda Perspective
5:46 – 6:08Watch this moment ↗
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