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agrees with me about the "Conchoid" of de Sluze ... and the def'n I've substituted has no real distinction from cissoid (the sum can be changed to difference just by reflecting through the origin). So this should be changed to the standard def'n.
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In case someone with more knowledge of editing math articles reads this, just letting you know, there are references to the conchoid in this wired article on a new solar collector, maybe good as reference for the wiki article?
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I think this article would be better if the first part under decription were to be moved into the intro paragraph
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the conchoid can be used to solve the problems of "trisection of an angle" and "duplication of the cube" see:
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as a conchoid — because the sweeping lines don't share a point. But no pains are taken to exclude
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on
Knowledge. If you would like to participate, please visit the project page, where you can join
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