Tensor-multi-scalar theories from multidimensional cosmology
Abstract
Inhomogeneous multidimensional cosmological models with a higher dimensional space-time manifold M=M0 x M1 x ... Mn are investigated under dimensional reduction to tensor-multi-scalar theories. In the Einstein conformal frame, these theories take the shape of a flat sigma-model. For the singular case where M0 is 2-dimensional, the dimensional reduction to dilaton gravity is preformed with different distinguished representations of the action.
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