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Cosmology in sixth-order higher-derivative theories of gravity
cosmology-and-nongalactic-astrophysicsgeneral-relativity-and-quantum-cosmologyhigh-energy-physics-theory
We analyze the cosmological implications of theories of gravity with quadratic curvature invariants $R^2$ and $C^{μνρσ}C_{μνρσ}$, and six-derivative operators $R\Box R$ and $C^{μνρσ}\Box C_{μνρσ}$. We first analyze homogeneous and isotropic cosmological solutions, showing that the theory admits expa
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