In theoretical physics, a scalar-tensor theory is a theory that includes both a scalar field and a tensor field to represent a certain interaction. For example, the Brans-Dicke theory of gravitation uses both a scalar field and a tensor field to mediate the gravitational interaction.
Read more about Scalar-tensor Theory: Tensor Fields and Field Theory, Gravity As Field Theory, Higher-dimensional Relativity and Scalar-tensor Theories
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“Could Shakespeare give a theory of Shakespeare?”
—Ralph Waldo Emerson (1803–1882)