Mercurial > repo
view wisdom/categorical product @ 11297:ac12b31f8f5d
<wob_jonas> perl -eopen$i,"<",($f="wisdom/aristotle");$_=<$i>; s/find fifth/find the fifth/ or die; if (1) { open$o,">",$f; print$o $_ or die; } print substr$_,0;
author | HackBot |
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date | Mon, 01 Jan 2018 18:03:15 +0000 |
parents | 00af4aaadf2c |
children |
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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.