view wisdom/lambek's lemma @ 10559:d4b7e98741d7

<shachaf> swrjan s.exclu.inci.
author HackBot
date Fri, 31 Mar 2017 00:08:59 +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.