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<wib_jonas> fetch bin/beat https://hack.esolangs.org/get/bin/beat
author HackEso <hackeso@esolangs.org>
date Tue, 17 Sep 2019 13:32:58 +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.