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↓ ABCD schemes
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table of coefficients (about 18 digits) (.txt) AB scheme, complex: PP 3/4 A c
s=3, p=3, optimal?; palindromic (Auzinger 2015)
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same as in Emb 3/2 A c
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LEM: 0.3
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Let (I) = given scheme, and (II) = (I) applied with A,B exchanged
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Then the additive scheme ((I)+(II))/2 has order p=4;
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((I)-(II))/2 is local error estimator for (I)
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i | ai | bi |
1 | 0.201639688260407656 + 0.105972321241365172 i | a3 |
2 | 0.410612900985895537 - 0.206043441934939727 i | a2 |
3 | 0.387747410753696807 + 0.100071120693574555 i | a1 |
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