view wisdom/lambek's lemma @ 11447:3b3397309a6e

<wob_jonas> forget bpaaihiyw
author HackBot
date Fri, 09 Mar 2018 21:38:35 +0000
parents d3a12978331a
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Lambek's Lemma, invented by Joachim "Taneb" Lambek, states that initial algebras have inverses. It can be proved with as few as five arrows.