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Stub grade: D
This page is a stub
This page is a stub, so it contains little or minimal information and is on a to-do list for being expanded.The message provided is:
Needs references and such, to make it as nice as the category page
This page is a dire page and is in desperate need of an update.


A subcategory is a category who's objects and morphisms/arrows are a subset (subclass for certain kinds of category) of those in the "parent" category. Same as every other sub(object).