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annotate wisdom/lambek's lemma @ 11321:14314c55571e

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<FireFly> ` echo "$(cat wisdom/fonts) , FireFly\'s fonts http://xen.firefly.nu/up/fonts/ & https://twitter.com/FireyFly/status/899965577481129984" >/tmp/a && cp /tmp/a wisdom/fonts && cat wisdom/fonts
author HackBot
date Mon, 15 Jan 2018 22:31:52 +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
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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.