view wisdom/morphism @ 9154:a54e1016e690

<oerjan> learn E-modules are modules over a web ring. Uaneb invented them.
author HackBot
date Wed, 05 Oct 2016 15:05:28 +0000
parents c3f8b4762fa7
children a655017e4390
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A morphism is just a natural transformation between two functors on 1.