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view wisdom/categorical product @ 7439:4152f8bd25f0
<b_jonas> learn Macedonia and Taiwan are two countries of which the United Nations denies the existance.
author | HackBot |
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date | Sun, 17 Apr 2016 22:02:05 +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.