Total entropy in the open and flat massive conformal gravity universe grows with time, so those cosmologies pass the generalized second law; the closed one fails.
On the vDVZ discontinuity in massive conformal gravity
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By taking the massless limit of linearized massive conformal gravity coupled to a source, we show that the theory is free from the vDVZ discontinuity. This result is confirmed when we take the massless limit of the gravitational potential of the theory, which is shown to be finite at the origin.
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On the entropy of the massive conformal gravity universe
Total entropy in the open and flat massive conformal gravity universe grows with time, so those cosmologies pass the generalized second law; the closed one fails.