“…Starting with the work of [2,3] the chain of exceptional symmetry groups E n (R) has been a recurring theme in analyses of these symmetry structures [4,5,6,7]. In particular, the emergence of the hyperbolic Kac-Moody algebra E 10 in the reduction to one dimension had already been conjectured in [8], see also [9,10]. More recently, it was argued that the bosonic supergravity field equations in eleven space-time dimensions correspond to a non-linear realization of the indefinite Kac-Moody group E 11 (jointly with the conformal group) [11,12], and these considerations were extended also to the (massive) IIA and IIB supergravity theories [13,14,15] by using the same groups.…”