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↓ ABCD schemes
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table of coefficients (about 18 digits) (.txt) AB scheme, real: PP 5/6 HA
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s=8, p=5, best palindromic found (Hofstätter 2017)
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LEM: 0.04
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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=6
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((I)-(II))/2 is local error estimator for (I)
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| i | ai | bi |
| 1 | 0.0948061248009638376 | a8 |
| 2 | 0.295318061899768333 | a7 |
| 3 | 1.53754156461995477 | a6 |
| 4 | -1.76438699139537428 | a5 |
| 5 | 0.0815411353471173585 | a4 |
| 6 | -0.0003461873752067731 | a3 |
| 7 | 0.516036508038544019 | a2 |
| 8 | 0.239489784064232735 | a1 |
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