We construct the non-linear Kaluza-Klein ansätze describing the embeddings of the U(1)3, U(1)4 and U(1)2 truncations of D = 5, D = 4 and D = 7 gauged supergravities into the type IIB string and… (More)

Membrane/fivebrane duality in D = 11 implies Type IIA string/Type IIA fivebrane duality in D = 10, which in turn implies Type IIA string/heterotic string duality in D = 6. To test the conjecture, we… (More)

We present a generic Lagrangian, in arbitrary spacetime dimension D, describing the interaction of a dilaton, a graviton and an antisymmetric tensor of arbitrary rank d. For each D and d, we find "… (More)

We re-examine the question of heterotic heterotic string duality in six dimensions and argue that the E8 ×E8 heterotic string, compactified on K3 with equal instanton numbers in the two E8’s, has a… (More)

The recent proposal by Hawking and Turok for obtaining an open inflationary universe from singular instantons makes use of low-energy effective Lagrangians describing gravity coupled to scalars and… (More)

Superunification underwent a major paradigm shift in 1984 when eleven-dimensional supergravity was knocked off its pedestal by ten-dimensional superstrings. This last year has witnessed a new shift… (More)

In M-theory vacua with vanishing 4-form F(4), one can invoke the ordinary Riemannian holonomy H ⊂ SO(10, 1) to account for unbroken supersymmetries n = 1, 2, 3, 4, 6, 8, 16, 32. However, the… (More)

We present a class of black p-brane solutions of M-theory which were hitherto known only in the extremal supersymmetric limit, and calculate their macroscopic entropy and temperature.

After simultaneous compactification of spacetime and worldvolume on K3, the D = 10 heterotic fivebrane with gauge group SO(32) behaves like a D = 6 heterotic string with gauge group SO(28) × SU(2),… (More)

In six spacetime dimensions, the heterotic string is dual to a Type IIA string. On further toroidal compactification to four spacetime dimensions, the heterotic string acquires an SL(2, Z) S… (More)