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<tswett_> le//rn tree//You should sometimes (but not always) ignore trees.
author HackBot
date Mon, 19 Dec 2016 02:01:21 +0000
parents 74cae6b8f28c
children 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 morphism w:X->C such that u=wp and v=wq.