view wisdom/lambek's lemma @ 12106:204fe444dca2 draft

<fizzie> sled /hackenv/bin/airport-lookup//s|share/airports.dat|/hackenv/share/airports.dat|
author HackEso <hackeso@esolangs.org>
date Sat, 16 Nov 2019 22:35:00 +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.