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when toggle format what by license comment
May 1, 2010 at 18:28 answer added Qiaochu Yuan timeline score: 2
May 1, 2010 at 16:42 comment added user2734 I think you're looking for preservation of limits (products in your example). I didn't check it, but I see in Wikipedia (en.wikipedia.org/wiki/Adjoint_functors) that the "group of units" functor has a left adjoint, and therefore it preserves all limits, including binary products.
May 1, 2010 at 15:41 history asked Robin Saunders CC BY-SA 2.5