The recent mathematical literature introduces generalised geometries which are defined by a reduction from the structure group SO(d, d) of the vector bundle T d âŠ• T dâˆ— to a special subgroup. In thisâ€¦ (More)

We consider warp compactifications of M-theory on 7-manifolds in the presence of 4-form fluxes and investigate the constraints imposed by supersymmetry. As long as the 7-manifold supports only oneâ€¦ (More)

Conjugation and bacteriophage P1 transduction experiments in Escherichia coli showed that resistance to the antibacterial compound diazaborine is caused by an allelic form of the envM gene. The envMâ€¦ (More)

We use the differential geometrical framework of generalized (almost) Calabi-Yau structures to reconsider the concept of mirror symmetry. It is shown that not only the metric and B-field but also theâ€¦ (More)

We describe the geometry of type II string compactifications to 6â€“ and 7â€“dimensional backgrounds with Ramondâ€“Ramondâ€“fields in terms of principal fibre bundle as generalised SU(3)â€“ and G2â€“ structures.â€¦ (More)

We consider topological sigma models with generalized KÃ¤hler target spaces. The mirror map is constructed explicitly for a special class of target spaces and the topological A and B model are shownâ€¦ (More)

We consider compactifications of M-theory on 7-manifolds in the presence of 4-form fluxes, which leave at least four supercharges unbroken. We focus especially on the case, where the 7-manifoldâ€¦ (More)

We consider compactifications of M-theory on 7-manifolds in the presence of 4-form fluxes, which leave at least four supercharges unbroken. Supersymmetric vacua admit G-structures and we discuss theâ€¦ (More)

In flux compactifications of M-theory a superpotential is generated whose explicit form depends on the structure group of the 7-dimensional internal manifold. In this note, we discuss superpotentialsâ€¦ (More)

In flux compactifications of M-theory a superpotential is generated whose explicit form depends on the structure group of the 7-dimensional internal manifold. In this note, we discuss superpotentialsâ€¦ (More)