Talk:Operator theory

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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 22:59, 20 May 2007 (UTC)

[edit] Bounded operators only?

"operator theory is the branch of functional analysis which deals with bounded linear operators and their properties" --- really, only bounded? Then, why Closed operator and Densely-defined operator are in the Category:Operator theory? Boris Tsirelson (talk) 06:33, 17 April 2009 (UTC)