Re: [math-fun] Fwd: Coeffts of modular forms of exceptional groups

Noam D. Elkies, Benedict H. Gross: The exceptional cone and the Leech lattice,, International Math. Research Notices 1996 #14, 665-698.

That's a great paper! I remember reading it last year and being pleasantly surprised by the elegant construction of the Leech lattice using the 'integer points' in the exceptional Jordan algebra h3(O). I gave a quick introduction here: https://cp4space.hatsya.com/2020/10/28/the-exceptional-jordan-algebra/ although you'll want to read the original paper for the full details. Best wishes, Adam P. Goucher