Higher dimensional cosmological solutions in vacuum with two spatially flat subspaces are studied in the framework of the extended Einstein theory with the Gauss-Bonnet term. It is found that the initial singularity can be eliminated. A large discrepancy of the two scales of the submanifolds is produced rapidly in the early stage. In the later stage the model universe approaches to a higher dimensional Kasner solution. © 1986.
Ishihara, H. (1986). Cosmological solutions of the extended Einstein gravity with the Gauss-Bonnet term. Physics Letters B, 179(3), 217–222. https://doi.org/10.1016/0370-2693(86)90569-1