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f(R) gravity: successes and challenges
Published 15 Oct 2008 in gr-qc and hep-th | (0810.2602v1)
Abstract: We review the state of the art of f(R) theories of gravity (in their various formulations), which have been proposed as an explanation of the cosmic acceleration alternative to dark energy. The successes of f(R) gravity are discussed, together with the challenges imposed by minimal criteria for their viability.
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