De Sitter spacetimes from warped compactifications of IIB string theory

We continue our study of codimension two solutions of warped spacetime varying compactifications of string theory. In this Letter we discuss a non-supersymmetric solution of the classical type IIB string theory with de Sitter gravity on a codimension two uncompactified part of spacetime. A non-zero positive value of the cosmological constant is induced by the presence of non-trivial stringy moduli, such as the axion-dilaton system for the type IIB string theory. Furthermore, the naked singularity of the codimension two solution is resolved by the presence of a small but non-zero cosmological constant. (C) 2002 Published by Elsevier Science B.V.