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<oerjan> slwd moon//s,__,__ noomy,
author HackEso <hackeso@esolangs.org>
date Thu, 28 Nov 2019 02:14:45 +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.