AdS5xS5 untwisted

Noting that T-duality untwists S-5 to CP2 x S-1, we construct the duality chain: n = 4 super Yang-Mills --> type IIB superstring on AdS(5) x S-5 --> type IIA superstring on AdS(5) x CP2 x S-1 -->, M-theory on AdS(5) x CP2 x T-2. This provides another example of supersymmetry without supersymmetry: on AdS(5) x CP2 x S-1, type IIA supergravity has SU(3) x U(I) x U(1) x U(1) and N = 0 supersymmetry but type IIA string theory has SO(6) and N = 8. The missing superpartners are provided by stringy winding modes. We also discuss IIB compactifications to AdS(5) with N = 4, N = 2 and N = 0. (C) 1998 Elsevier Science B.V.