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<b_jonas> `` set -e; f=/hackenv/bin/STOP; >$f echo $\'#!/bin/sh\\nrm -vf /hackenv/bin/bfbotquine\'; chmod -c a+x "$f"
author HackEso <hackeso@esolangs.org>
date Fri, 29 Nov 2019 23:32:11 +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.