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<boily> le/rn beer//Beer never ships from Qu\xc3\xa9bec.
author HackBot
date Wed, 11 Oct 2017 01:11:03 +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.