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<oerjan> learn_append A test is a test, in jest, in jest.
author HackBot
date Tue, 12 Dec 2017 21:58:37 +0000
parents 00af4aaadf2c
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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.