# Accurate summation algorithm

**URL:** <https://discourse.julialang.org/t/accurate-summation-algorithm/7163>\
**Category:** Numerics\
**Created:** [November 19, 2017, 1:51am UTC](https://discourse.julialang.org/t/accurate-summation-algorithm/7163 "2017-11-19T01:51:17Z")\
**Posts on this page:** 1\
**Showing post:** 24

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**Author:** ![certik](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/certik/32/2651_2.png) [@certik](https://discourse.julialang.org/u/certik)\
**Post date:** [November 30, 2017, 3:46pm UTC](https://discourse.julialang.org/t/accurate-summation-algorithm/7163/24 "2017-11-30T15:46:17Z")

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I think the reason we can’t reach an agreement is that there are a lot of sub-problems that we never agreed upon a clear “yes” or “no”, and the overall subject is very complicated, and impossible to make progress on unless we can at least agree on these simple sub-problems. So I have asked one such sub-problem here: [Can the following list of transformations turn a stable well conditioned algorithm into an unstable one?](https://discourse.julialang.org/t/can-the-following-list-of-transformations-turn-a-stable-well-conditioned-algorithm-into-an-unstable-one/7413), let’s discuss that one. After we reach a clear agreement on that, we can tackle the rest.

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