jaj•a•person's notes

  • Groups as categories

Things as categories

Groups as categories

A group is equivalent to a single-object groupoid. Adopting this viewpoint

  • A group homomorphism is a functor of groups-as-categories
  • The direct product of groups is the product category of groups-as-categories


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  • Dual group representation
  • Group representation
  • Multifunctor
  • Things as categories

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