Physics
Scientific paper
Mar 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999cqgra..16..911e&link_type=abstract
Classical and Quantum Gravity, Volume 16, Issue 3, pp. 911-918 (1999).
Physics
4
Scientific paper
Lovelock actions (more precisely, extended Gauss-Bonnet forms) when varied as Cartan forms on subspaces of higher-dimensional flat Riemannian manifolds, generate well set, causal exterior differential systems. In particular, the Einstein-Hilbert action 4-form, varied on a four-dimensional subspace of 0264-9381/16/3/019/img1, yields a well set generalized theory of gravity having no constraints. Ricci-flat solutions are selected by initial conditions on a bounding 3-space.
Estabrook Frank B.
Robinson Rebecca S.
Wahlquist Hugo D.
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