Talk:Conchoid (mathematics)

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No, this definition does not agree with Mathworld. Notice the pains taken to exclude Dürer's as a conchoid — because the sweeping lines don't share a point. But no pains are taken to exclude de Sluze's, and I see no "nice" curve that will give de Sluze under the other def'n. (Perhaps the origina has to be moved?) If you can pull it off, do it. 142.177.15.55 22:04, 13 Aug 2004 (UTC)

Aha. This page 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. 142.177.24.163 03:30, 19 Aug 2004 (UTC)

Doneded. 142.177.127.106 23:15, 19 Aug 2004 (UTC)

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? http://www.wired.com/wired/archive/13.07/solar.html --BjornVDM 23:03, 11 July 2005 (UTC)