8000 gh-111933: fix broken link to A.Neumaier article by skirpichev · Pull Request #111937 · python/cpython · GitHub
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gh-111933: fix broken link to A.Neumaier article #111937

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Merged
merged 6 commits into from
Nov 12, 2023
Merged

gh-111933: fix broken link to A.Neumaier article #111937

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f2a7a57
gh-111933: fix broken link to A.Neumaier article
skirpichev Nov 10, 2023
652be90
Update Python/bltinmodule.c
skirpichev Nov 11, 2023
ed85ed9
Minor reformatting & replace archive.org with a link to prof Neumaier…
skirpichev Nov 11, 2023
1e97bc4
Merge branch 'main' into fix-sum-link
rhettinger Nov 11, 2023
09ebdf7
Switch to wikipedia link.
rhettinger Nov 11, 2023
34ccf26
Merge branch 'main' into fix-sum-link
rhettinger Nov 11, 2023
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Switch to wikipedia link. 
Co-authored-by: Sergey B Kirpichev <skirpichev@gmail.com>
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@rhettinger @skirpichev
rhettinger and skirpichev authored Nov 11, 2023
commit 09ebdf7c49da3b93e0dc79557ec3cb753643a77b
2 changes: 1 addition & 1 deletion Python/bltinmodule.c
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Expand Up @@ -2614,7 +2614,7 @@ builtin_sum_impl(PyObject *module, PyObject *iterable, PyObject *start)
// Neumaier, A. (1974), Rundungsfehleranalyse einiger Verfahren
// zur Summation endlicher Summen. Z. angew. Math. Mech.,
// 54: 39-51. https://doi.org/10.1002/zamm.19740540106
// Scanned text: https://arnold-neumaier.at/scan/01.pdf
// https://en.wikipedia.org/wiki/Kahan_summation_algorithm#Further_enhancements
double x = PyFloat_AS_DOUBLE(item);
double t = f_result + x;
if (fabs(f_result) >= fabs(x)) {
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