Parametrix for a hyperbolic initial value problem with dissipation in some region

Details Parametrix for a hyperbolic initial value problem with dissipation in some region Parametrix for a hyperbolic initial value problem with dissipation in some region

2003-12-05

arxiv.org/abs/math/0312119v1

Mathematics

Analysis of PDEs

19 pages

Scientific paper

We consider the initial value problem for a pseudodifferential equation with first order hyperbolic part, and an order $\gamma > 0$ dissipative term. Under an assumption, depending on an integer parameter $L \geq 2$ such that $2 \gamma < L$, we construct for this initial value problem a parametrix that is a Fourier integral operator of type $\rho = 1 - \gamma/L$. The assumption implies that where the principal symbol of the dissipative term is zero, the terms of order up to $L-1$ in its Taylor series also vanish.

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