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<oerjan> learn The password of the month is equally offensive to all beliefs (but not time zones)
author HackBot
date Fri, 01 Dec 2017 03:01:21 +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.