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3D frequency-domain seismic modeling with a Block Low-Rank algebraic multifrontal direct solver

Abstract : Three-dimensional frequency-domain full waveform inversion of fixed-spread data can be efficiently performed in the viscoacoustic approximation when seismic modeling is based on a sparse direct solver. We present a new algebraic Block Low- Rank (BLR) multifrontal solver which provides an approximate solution of the time-harmonic wave equation with a reduced operation count, memory demand and volume of communication relative to the full-rank solver. We show some preliminary simulations in the 3D SEG/EAGE overthrust model, that give some insights on the memory and time complexities of the low-rank solver for frequencies of interest in fullwaveform inversion (FWI) applications.
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https://hal.inria.fr/hal-00924638
Contributor : Jean-Yves l'Excellent <>
Submitted on : Tuesday, January 7, 2014 - 9:21:54 AM
Last modification on : Thursday, March 18, 2021 - 2:29:20 PM

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Clement Weisbecker, Patrick Amestoy, Olivier Boiteau, Romain Brossier, Alfredo Buttari, et al.. 3D frequency-domain seismic modeling with a Block Low-Rank algebraic multifrontal direct solver. SEG Technical Program Expanded Abstracts, SEG annual meeting, Houston, TX, USA, 2013, Houston, Texas, United States. ⟨10.1190/segam2013-0603.1⟩. ⟨hal-00924638⟩

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