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<shachaf> forget categorical product
author HackEso <hackeso@esolangs.org>
date Sun, 01 Dec 2019 19:43:34 +0000
parents d3a12978331a
children
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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.