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<arseniiv> learn The password of the month is not what it seems
author HackEso <hackeso@esolangs.org>
date Tue, 01 Oct 2019 09:56:10 +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.