Multi-string theories, massive gravity a
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V. Niarchos
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Article
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2009
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John Wiley and Sons
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English
β 258 KB
## Abstract Infrared modifications of gravity have been proposed over the years as potentially useful phenomenological models. Massive (multi)βgravity is an interesting class of such theories. The true nature and the ultimate consistency of many of these models remains, however, unclear as one is f