view wisdom/lambek's lemma @ 11205:ab360e308ea1

<shachaf> forget rho
author HackBot
date Sat, 30 Sep 2017 00:11:17 +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.