A POSSIBLE SOLUTION TO THE PROBLEM OF EXTRA DIMENSIONS

We consider a multidimensional universe with the topology $M= \R\times M_1\times \cdots \times M_n$, where the $M_i$ ($i>1$) are $d_i$-dimensional Ricci flat spaces. Exploiting a conformal equivalence between minimal coupling models and conformal coupling models, we get exact solutions for such an universe filled by a conformally coupled scalar field. One of the solutions can be used to describe trapped unobservable extra dimensions.

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