We consider type II string theory in space-time backgrounds which admit eight supercharges. Such backgrounds are characterized by the existence of a (generically nonintegrable) generalized SU (3)×SU… (More)

We characterize N = 1 vacua of type II theories in terms of generalized complex structure on the internal manifold M . The structure group of T (M)⊕T (M) being SU(3)×SU(3) implies the existence of… (More)

This paper analyses type II string theories in backgrounds which admit an SU (3)×SU (3) structure. Such backgrounds are designed to linearly realize eight out of the original 32 supercharges and as a… (More)

We show that the supersymmetry transformations for type II string theories on six-manifolds can be written as differential conditions on a pair of pure spinors, the exponentiated Kähler form e and… (More)

We exhibit a one-parameter family of regular supersymmetric solutions of type IIB theory that interpolates between Klebanov-Strassler (KS) and Maldacena-Nuñez (MN). The solution is obtained by… (More)

We consider warped type IIB supergravity solutions with three-form flux and N = 1 supersymmetry, which arise as the supergravity duals of confining gauge theories. We first work in a perturbation… (More)

We consider configurations of D7-branes and whole and fractional D3-branes with N = 2 supersymmetry. On the supergravity side these have a warp factor, three-form flux and a nonconstant dilaton. We… (More)

We prove that the lower bounds for Betti numbers of the rack, quandle and degeneracy cohomol-ogy given in [CJKS] are in fact equalities. We compute as well the Betti numbers of the twisted cohomology… (More)

We perform a systematic analysis of generic string flux compactifications, making use of Exceptional Generalized Geometry (EGG) as an organizing principle. In particular, we establish the precise map… (More)

We show that the supersymmetry transformations for type II string theories on six-manifolds can be written as differential conditions on a pair of pure spinors, the exponentiated Kähler form e and… (More)