Conformal and Quasiconformal Realizations of Exceptional Lie Groups (2000)
Günaydin, M, Koepsell, K, Nicolai, Hermann C
We present a nonlinear realization of E_8 on a space of 57 dimensions, which is quasiconformal in the sense that it leaves invariant a suitably defined ``light cone'' in 57 dimensions. This...
Two-loop finiteness of D = 2 supergravity (1992)
De Wit, Bernard, Grisaru, Marc T, Rabinovici, Eliezer, Nicolai, Hermann C