Inserted subsections on numerical solutions in Sections 6 and 7 and five figures. Added new Subsection 2.2 on the Randall–Sundrum model in string theory. Added new Section 9 on Dvali–Gabadadze–Porrati models and nine figures. Added new Section 10 on 6-dimensional models and one figure. Added about 100 new references.
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| Extended a paragraph moved here from the end of Section 1.2. | |
| Added Subsection 2.2 “RS model in string theory”. | |
| Added two paragraphs discussing the neglection of backreaction due to metric perturbations in the bulk. | |
| Added Subsection 6.5 “Full numerical solutions”. | |
| Removed former Figure 11: Damping of brane-world gravity waves on horizon re-entry due to massive mode generation. | |
| Added Subsection 7.2 “Full numerical solutions”. | |
| Added Section 9 “DGP Models”. | |
| Added Section 10 “6-Dimensional Models”. |
http://www.livingreviews.org/lrr-2004-7
| http://www.livingreviews.org/lrr-2010-5 | This work is licensed under a Creative Commons License. Problems/comments to |