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The Time Domain Lippmann-Schwinger Equation and Convolution Quadrature

We consider time domain acoustic scattering from a penetrable medium with a variable sound speed. This problem can be reduced to solving a time domain volume Lippmann-Schwinger integral equation. Using convolution quadrature in time and trigonometric collocation in space we can compute an approximate solution. We prove that the time domain Lippmann-Schwinger equation has a unique solution and prove conditional convergence and error estimates for the fully discrete solution for smooth sound speeds. Preliminary numerical results show that the method behaves well even for discontinuous sound speeds.

preprint2014arXivOpen access
Armin LechleiterPeter Monk
math.NA
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Armin LechleiterPeter Monk

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