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arxiv: astro-ph/0610734 · v2 · submitted 2006-10-25 · 🌌 astro-ph · gr-qc

Matter instability in modified gravity

Valerio Faraoni (Bishop's University) This is my paper
classification 🌌 astro-ph gr-qc
keywords gravityinstabilitymattermodifiedtheoriesconditioncorrectiondiscovered
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The Dolgov-Kawasaki instability discovered in the matter sector of the modified gravity scenario incorporating a 1/R correction to Einstein gravity is studied in general f(R) theories. A stability condition is found in the metric version of these theories to help ruling out models that are unviable from the theoretical point of view.

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    Modified gravity theories supply viable mathematical frameworks for inflation, bounces, and dark energy eras that match observational data.