A Lightcone Embedding of the Twin Building of a Hyperbolic Kac-Moody Group

Lisa Carbone, Alex J. Feingold, Walter Freyn

Let A be a symmetrizable hyperbolic generalized Cartan matrix with Kac-Moody algebra g = g(A) and (adjoint) Kac-Moody group G = G(A)=$\langle\exp(ad(t e_i)), \exp(ad(t f_i)) \,|\,…