Adequate subcategories
J. R. Isbell · Illinois Journal of Mathematics · 1960
Further, if a is a left adequate subcategory of (, almost no useful restriction on ( can be inferred from restrictions on a.Neither of these objections ap- plies to the notion of left and right adequacy.This does yield a closure opera- tion.The main drawback, as the examples show, is that the operation is rather feeble.