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Table 4.

Same as Table 2, but for the SOR preconditioner.

Ns 20 40 60 80 100 120 140
Richardson 25 26 41 55 68 79 90
GMRES 10 17 23 27 31 34 37
BICGSTAB 5 8 12 13 14 15 16
CGS 7 12 17 24 28 33 35

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