view wisdom/lambek's lemma @ 11270:0e5762d8b214

<oerjan> le/rn nak//
author HackBot
date Thu, 14 Dec 2017 21:53:03 +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.