17 Jul
2015
17 Jul
'15
1:16 p.m.
There is a perspex model of Dandelin’s spheres at the Mathematica exhibition (the one by Charles and Ray Eames). Just by the model of the Zeta function.
On 17 Jul 2015, at 20:05, Adam P. Goucher <apgoucher@gmx.com> wrote:
Is there a proof this short and simple that the ellipse defined by these definitions is related to a circle by an affine transformation?
Yes: https://en.wikipedia.org/wiki/Dandelin_spheres
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