Symmetry of Brans-Dicke gravity as a novel solution-generating technique
  A symmetry of Brans-Dicke gravity in (electro-)vacuo or in the presence of
conformally invariant matter is presented and used as a solution-generating
technique starting from a known solution as a seed. This novel technique is
applied to generate, as examples, new spatially homogeneous and isotropic
cosmologies, a 3-parameter family of spherical time-dependent spacetimes
conformal to a Campanelli-Lousto geometry, and a family of cylindrically
symmetric geometries.
