Talk:Dual (category theory)

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Mathematics rating:	Start Class	Mid Priority	Field: Foundations, logic, and set theory
Please update this rating as the article progresses, or if the rating is inaccurate. Click to show/hide comments. Please add to or update the comments to suggest improvements to the article. Geometry guy 22:17, 10 June 2007 (UTC)

Actually the Pontryagin duality is between the category of locally compact abelian groups and its own opposite; and restricts to a duality between compact and discrete groups. So I prefer the earlier wording. We could do with having the PD article in place, naturally.

Charles Matthews 08:38, 9 Nov 2003 (UTC)

[edit] Terminology: Dual vs. Opposite

Mirror question to one I asked in Talk:Equivalence_of_categories: isn't opposite category a better established usage than dual category? ---- Charles Stewart 11:24, 31 Aug 2004 (UTC)