view wisdom/monoid @ 36:4cb1612c02cf

<oerjan> learn Natural transformations are just morphisms in the category of functors
author HackBot
date Thu, 01 Mar 2012 00:11:23 +0000
parents e037173e0012
children c777e2d91031 29a9ce93fa52
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Monoids are just categories with a single object.