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↓ ABCD schemes
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table of coefficients (about 18 digits) (.txt) AB scheme, complex: Milne 2/2 c (ii)
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(I) s=2, p=2, optimized (Auzinger 2015)
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LEM: 0.1
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| i | ai | bi |
| 1 | 4/13 - 1/26 i | 18/25 - 1/25 i |
| 2 | 9/13 + 1/26 i | 7/25 + 1/25 i |
Associated scheme:
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(II) s=2, p=2, a2 purely imaginary
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LEM: 2.
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'Milne device': With κ=1/20 + i/60, κ*((I)-(II)) is local error estimator for (I)
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| i | ai,associated | bi,associated |
| 1 | 1 + 1/2 i | i |
| 2 | -1/2 i | 1 - i |
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