view wisdom/categorical product @ 9458:c332628b8660

<oerjan> le/rn hoag/`[hd]o[aw][gt] [<filename>] is a set of commands for querying HackEgo logs. `hoag is the basic version. d adds dates, w looks only in wisdom, and t lists in reverse.
author HackBot
date Thu, 27 Oct 2016 00:25:27 +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.