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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 00af4aaadf2c
children
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categorical product is like when you have two category elements A and B then their product is element C iff there are two morphisms p:C->A and q:C->B such that for every element X and morphisms u:X->A and v:X->B there is a unique morphism w:X->C such that u=wp and v=wq.