Abstract
The theories describing not only a metric but also an additional scalar field (metric-scalar theories) are popular extensions of general relativity. In this section, we consider the conformal transformations in these theories and their mapping into purely metric models with modified Lagrangians. The contents of this section are rather pretty well known and have been discussed in many papers (see, e.g., [1, 2] for reviews). Our exposition will follow the papers [3, 4] and after that [5].
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Shapiro, I.L. (2019). Special Sections. In: A Primer in Tensor Analysis and Relativity. Undergraduate Lecture Notes in Physics. Springer, Cham. https://doi.org/10.1007/978-3-030-26895-4_17
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DOI: https://doi.org/10.1007/978-3-030-26895-4_17
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