Talk:Adriaan van Wijngaarden

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[edit] van Wijngaarden summation formula

I'm slightly surprised that this article has no mention of van Wigngaarden's summation formula. It takes a monotonic (known convergent) series, and converts it into one with alternating signs, to which a method such as Euler's - for which he provided a _very_ neat (adaptive) algorithm, successively available in the Reports on the Algol series of programming languages - or the more modern methods due to Cohen, Rodriguez Villegas and Zagier.

Hair Commodore 19:31, 31 October 2006 (UTC)