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What is this? What does it look like?Mr.WaeseL 20:33, 4 July 2007 (UTC)
Too technical edit
I marked the article as "too technical" as it's not understandable to anyone not familiar with sets and multivariable, multiple integral calculus. Some intuitive statement of what a "planar lamina" actually is (as opposed to a formal mathematical definition) in at most high-school level language would be nice, as well as a picture if applicable.
TristanLuigi (talk) 02:06, 17 October 2015 (UTC)