The equations for the linear paraxial approximation of the polarization vectors and for the variation of the polarization vectors with a velocity perturbation are presented.
Polarization vectors, paraxial ray approximation, ray perturbation, isotropic ray theory, elastic waves.
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Klimes, L.: Perturbation of the polarization vectors in the isotropic ray theory. Pure and appl. Geophys., 159 (2002), 1437-1445.