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view wisdom/categorical product @ 9663:bef48a1863a4
<oerjan> sled bin/grwp//s/setopt/shopt/
author | HackBot |
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date | Fri, 11 Nov 2016 19:56:21 +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.