view wisdom/lambek's lemma @ 11319:cf167328310d

<shachaf> swrjan s,oet,unster,
author HackBot
date Mon, 15 Jan 2018 06:16:19 +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.