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

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Academic year: 2021

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Figure 1: A front before (a) and after (b) partial factorization.
Figure 3: Flop scalability of the BLR multifrontal factorization of the Laplacian operator discretized with a 3D 11-point  sten-cil, revealing a O(N 4/3 ) complexity for ε = 10 −14 , N = M 3 .
Figure 5: (a-c) Full-rank solution (real part). (a) 2 Hz, (b) 4 Hz, (c) 8 Hz. (d-f) Difference between full-rank and low-rank solutions for ε = 10 −3

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