http://www.rodinmath.com/

The rodin coil is supposed to be overunity, and the math is amazing!

Most significant ever?
The mathematics Mr. Rodin presents are interesting, but I think he's going a little too far with his interpretation.  ("Fingerprint of God" and so-on)  The central object of his work is basically a numerological "magic square" on a torus.  His obsession with the number 9 comes naturally out of the digit-sums in the base 10 number system.  Had he been biased instead to choose some other base, say base-8, there would be a similar fascination with the number 7.  I can't deny that base-10 is somehow special, at least in a religious/philosophical sense, but still...

Mr. Rodin is clearly a visionary, and I feel that he is getting quite close to something fundamental.  Some of his claims regarding the origin of electron spin resemble my own theoretical work, and I have to admit that I am a bit worried that people might think that I am ripping him off.  It is a historical fact that often scientific and mathematical breakthroughs are developed in parallel, completely independently, at about the same time.  Still, his basic coil design differs from mine in a few key respects, and his mathematical approach is completely different, so I think I can sleep peacefully for now.

The coil I will be building will be analogous to a toroidal slice of the hopf fibration.  I will start a new thread to keep you all updated.

I know of only one person on this forum who has built these coils, and was wondering, did anybody ever test the inductance of these coils against coils wound of the traditional manner, i.e. different coils, but same number of winds? What about the capacity? what are their ressonant points?

WHAT ABOUT INJECTING THE DONUT WITH MERCURY....OR PLACE MERCURY IN THE CENTER IN A GLASS...

Mercury can be poured into any shaped mold, and then sufficiently cooled to work as a superconducting manifold.  Custom-shaped superconductors.

At higher temperatures the diamagnetism of mercury along with its fluid-dynamic properties definitely give rise to some interesting and potentially useful effects when coupled with externally applied magnetic fields.