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arxiv: 0710.1291 · v1 · submitted 2007-10-05 · 🌀 gr-qc

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A viability criterion for modified gravity with an extra force

Valerio Faraoni (Bishop's University)
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classification 🌀 gr-qc
keywords gravitymodifiedanomalousavoidconditioncouplingcriterioncurvature
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A recently proposed theory of modified gravity with an explicit ``anomalous'' coupling of the Ricci curvature to matter is discussed, and an inequality is derived which expresses a necessary and sufficient condition to avoid the notorius Dolgov-Kawasaki instability.

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