The numerical solution of a nonseparable elliptic partial differential equation by preconditioned conjugate gradients
1980 ◽
Vol 85
(5)
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pp. 367
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1980 ◽
2011 ◽
Vol 28
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pp. 954-965
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1982 ◽
Vol 7
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pp. 609-643
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Vol 4
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pp. 147-157
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1992 ◽
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