view wisdom/lambek's lemma @ 10943:b92c126114f0

<shachaf> forget unicide
author HackBot
date Mon, 22 May 2017 02:02:20 +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.