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<b_jonas> `` rm -fv /hackenv/bin/STOP
author HackEso <hackeso@esolangs.org>
date Sat, 30 Nov 2019 22:33:37 +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.