Ray discusses the observer space in 'E8 Shelling By Seven-Spheres' video.
" ...recently, I was also interested in the E8 sphere shelling, which is one of the first ways that was used by Jean-Francois Sadoc & Rémy Mosseri around twenty years ago, to build the Elser-Sloane quasicrystal using discrete Hopf fibration. And here we see the circle which has shells of E8, with a beautiful symmetry, we are able to group points together on the lattice, and they will group in shells in the quasicrystal."
PREVIOUS BLOG POST (which includes link to Derek Wise paper 'Lifting general relativity to observer space' mentioned in the video.) http://kleeirwindeepthoughts.blogspot.com/2017/06/e8-shelling-by-seven-spheres.html









