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view wisdom/categorical product @ 9288:2bb3ea90aa0c
<oerjan> slwd scow//s/[.].*/./
author | HackBot |
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date | Sat, 15 Oct 2016 15:06:04 +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.