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<oerjan> learn `3 is the crazy sibling of `1, `2, `4 and `5.
author HackBot
date Sat, 20 May 2017 08:09:52 +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.