On Saturday, 18 October 2014 at 10:44:59 UTC, Ola Fosheim Grøstad wrote:
On Saturday, 18 October 2014 at 08:21:47 UTC, eles wrote:
On Saturday, 18 October 2014 at 05:54:01 UTC, Ola Fosheim Grøstad wrote:
On Saturday, 18 October 2014 at 04:35:07 UTC, Walter Bright wrote:

Larger mantissa can help a little bit, but only a little bit.

https://en.wikipedia.org/wiki/Kahan_summation_algorithm

Kahan helps a little bit:


a = [math.pi*(n**9) for n in range(0,101)]
      +[-math.pi*(n**9) for n in range(100,0,-1)]

This might simply be a case biased in favor of pairwise summation, as numbers ar symmetric.

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