Re: [math-fun] generalization of an ellipse to 3 foci ???

11 Nov 2012

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"HB" == Henry Baker <hbaker1@pipeline.com> writes:
HB> What would be the appropriate generalization of an ellipse to more than 2 foci ?

I thought I remembered reading something like this before, and found:

http://en.wikipedia.org/wiki/N-ellipse

which mentions the names:

multifocal ellipse
n-ellipse
k-ellipse
polyellipse
egglipse
generalized ellipse
Tschirnhaus'sche Eikurve

-JimC
-- 
James Cloos <cloos@jhcloos.com>         OpenPGP: 1024D/ED7DAEA6