view wisdom/functor @ 9339:5a16c94dca27

<tswett> le//rn Since when does le//rn exist?
author HackBot
date Wed, 19 Oct 2016 02:05:40 +0000
parents 1e323fe0c60e
children 69b3e38974d3
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Functors are just morphisms in the category of small categories.