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it should be easy
Q: What is the best way to explain the basic ideas of category theory to my grandmother?
A: If your grandmother is an algebraic topologist, it should be easy: explain how taking the homology group of a topological space is an example of a functor from the category of groups to the category of topological spaces, and then describe how different ways of defining homology groups give different, but naturally isomorphic functors.
(John Baez on Quora)
A: If your grandmother is an algebraic topologist, it should be easy: explain how taking the homology group of a topological space is an example of a functor from the category of groups to the category of topological spaces, and then describe how different ways of defining homology groups give different, but naturally isomorphic functors.
(John Baez on Quora)
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