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Article
Brans-dicke cosmology and the cosmological constant: The spectrum of vacuum solutions
We study the Brans-Dicke vacuum field equations in the presence of a cosmological term A. Considering a Friedmann-Robertson-Walker metric with flat spatial sections (k=0), we provide a qualitative analysis of the...
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Article
The equivalence between General Relativity and scalar-tensor theories of gravity
The equivalence between General Relativity and scalar-tensor theories is discussed. Vacuum solutions of the Brans-Dicke theory of gravity are shown to behave ambiguously whenever attempts are made to interpret...