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Untitled edit
Erm, how about a picture of this? I can only picture curves on normal parabolas and it would certainly help demonstrate what this article is referring to... Zotel - the Stub Maker 01:29, 26 October 2005 (UTC)
MathWorld edit
The structure of the article and some of the phrasing is very similar to the corresponding article in MathWorld. I suggest the article be re-written with a larger collection of sources, I will do this myself eventually if no one else does.--RDBury (talk) 20:32, 21 July 2009 (UTC)