The elastic wave equation of limited smoothness

Details The elastic wave equation of limited smoothness The elastic wave equation of limited smoothness

2010-09-05

arxiv.org/abs/1009.0933v1

Mathematics

Analysis of PDEs

Scientific paper

We establish a decoupling result for the $P$ and $S$ waves of linear, isotropic elasticity, in the setting of twice-differentiable Lam\'e parameters. Precisely, we show that the $P\leftrightarrow S$ components of the wave propagation operator are regularizing of order one on $L^2$ data, by establishing the diagonalization of the elastic system modulo a $L^2$-bounded operator. Effecting the diagonalization in the setting of twice-differentiable coefficients depends upon the symbol of the conjugation operator having a particular structure.

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