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<salpynx> ` ./interps/befunge/bef.bin "olleh">:#,_@
author HackEso <hackeso@esolangs.org>
date Sun, 13 Jan 2019 03:39:33 +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.