Abstract
We consider adding Euler densities to the Einstein action as new gravity interactions in higher-dimensional theories. When the appropriate surface terms are included, the surface geometry is sufficient data for the boundary-value problem associated with the new Lagrangians. We also discuss the relevance of such interactions in the context of string theory.
- Received 26 February 1987
DOI:https://doi.org/10.1103/PhysRevD.36.392
©1987 American Physical Society