view wisdom/lambek's lemma @ 12300:a20d4132c6b4 draft

<oerjan> le/rn_append zemhill//See http://zem.fi/bfjoust/ for more information.
author HackEso <hackeso@esolangs.org>
date Tue, 07 Jan 2020 07:35:11 +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.