Transverse-traceless gauge sets the time and longitudinal components and the spatial trace of a vacuum gravitational-wave perturbation to zero.
A gravitational wave in four-dimensional general relativity has two independent linear polarizations, conventionally called plus and cross. A rotation by angle in the transverse plane rotates their pair by .

Ancestors (8)

  1. Plane gravitational wave in linearized gravity
  2. Lorenz gauge in linearized gravity
  3. Trace-reversed metric perturbation
  4. Linearized gravity
  5. General relativity
  6. Branch of physics
  7. Physics
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