view wisdom/lambek's lemma @ 11395:a2b33201e8fd

<wob_jonas> forget oren\'s font
author HackBot
date Wed, 28 Feb 2018 02:28:46 +0000
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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.