Origins of category theory terms

From Saunders Mac Lane:

Now the discovery of ideas as general as these is chiefly the willingness to make a brash or speculative abstraction, in this case supported by the pleasure of purloining words from the philosophers: “Category” from Aristotle and Kant, “Functor’ from Carnap …, and “natural transformation” from the current informal parlance.

Aristotle and Saunders Mac Lane

Related: Applied category theory

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