Geodesic
Polarization anomalies of elastic waves. Caustic and penumbra
Zapiski Nauchnykh Seminarov POMI, Mathematical problems in the theory of wave propagation. Part 32, Tome 297 (2003), pp. 136-153 Cet article a éte moissonné depuis la source Math-Net.Ru

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Theoretical study of polarization-spectral anomalies of a wave field (that is its deviation from that predicted by simple plane-wave models) is presented. A simple method of numerical simulation of anomalies of nonstationary wave fields near a caustic and in penumbra is described. It uses both leading and correcting terms in asymptotic formulas. Examples of simulation of displacements and average polarization ellipses are given. A discussion of quantitative properties of wave fields presented. 
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A. P. Kiselev; V. O. Yarovoy; E. A. Vsemirnova. Polarization anomalies of elastic waves. Caustic and penumbra. Zapiski Nauchnykh Seminarov POMI, Mathematical problems in the theory of wave propagation. Part 32, Tome 297 (2003), pp. 136-153. http://geodesic.mathdoc.fr/item/ZNSL_2003_297_a8/

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