A profound understanding of the distributions of organisms through space and time led Charles Darwin and Alfred R. Wallace to present jointly the most influential biological hypothesis ever… (More)

The computation of two and three point functions in the Coulomb gas free field approach to string theory in the SL(2,R)/U(1) black hole background is reviewed. An interesting relation arises when… (More)

We study the spectral flowed sectors of the H 3 WZW model in the context of the holographic duality between type IIB string theory in AdS3 × S × T 4 with NSNS flux and the symmetric product orbifold… (More)

The computation of two and three point functions in the Coulomb gas free field approach to string theory in the SL(2,R)/U(1) black hole background is reviewed. An interesting relation arises when… (More)

Lovelock theory is a natural extension of Einstein theory of gravity to higher dimensions, and it is of great interest in theoretical physics as it describes a wide class of models. In particular, it… (More)

Recently, Ribault and Teschner pointed out the existence of a one-to-one correspondence between N -point correlation functions for the SL(2, C)k/SU(2) WZNW model on the sphere and certain set of 2N −… (More)

We investigate N -point string scattering amplitudes in AdS3 space. Based on recent observations on the solutions of KZ and BPZ-type differential equations, we discuss how to describe the string… (More)

We propose an equivalence between topological string on OSP(1|2)/U(1) and ĉ ≤ 1 superstring with N = 1 world-sheet supersymmetry. We examine this by employing a free field representation of OSP(1|2)… (More)

Junction conditions for vacuum solutions in five-dimensional Einstein-Gauss-Bonnet gravity are studied. We focus on those cases where two spherically symmetric regions of space-time are joined in… (More)

We look for the existence of asymptotically flat simple compactifications of the form MD−p × T p in D-dimensional gravity theories with higher powers of the curvature. Assuming the manifold MD−p to… (More)