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<fizzie> ` sed -e \'s|^ ||\' < \'wisdom/fun fact \' > \'wisdom/fun fact\'; rm \'wisdom/fun fact \'
author | HackBot |
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date | Wed, 01 Nov 2017 19:38:34 +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.