p-Branes and Exact solutions in Brans-Dicke cosmology with matter

We study the effect of the solitonic degree of freedom in string cosmology following the line of Rama. The gas of solitonic p-brane is treated as a perfect fluid in a Brans-Dicke type theory. In this paper, we find analytic solutions for a few solvable cases of equation of states with general Brans-Dicke parameter $ω$ and study the cosmology of the solutions. In some cases the solutions are free from initial singularity.

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