view wisdom/lambek's lemma @ 11364:3f1e458cdd11

<wob_jonas> forget ehlist
author HackBot
date Wed, 28 Feb 2018 01:51:26 +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.