annotate wisdom/lambek's lemma @ 12277:37e5bb140d98 draft

<kspalaiologos> fetch /hackenv/lib/kps/bfpp https://hack.esolangs.org/get/lib/kps/bfpp
author HackEso <hackeso@esolangs.org>
date Tue, 31 Dec 2019 18:29:39 +0000
parents d3a12978331a
children
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10491
d3a12978331a <shachaf> le/rn_append lambek\'s lemma//It can be proved with as few as five arrows.
HackBot
parents: 8401
diff changeset
1 Lambek's Lemma, invented by Joachim "Taneb" Lambek, states that initial algebras have inverses. It can be proved with as few as five arrows.