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<b_jonas> `` mv -vi share/mtg/All{_,\\ }Sets-2017-09-20.zip
author HackBot
date Wed, 04 Oct 2017 11:28:39 +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.