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Re: Floating-Point Computing

  • To: mathgroup at smc.vnet.net
  • Subject: [mg93933] Re: Floating-Point Computing
  • From: Szabolcs <szhorvat at gmail.com>
  • Date: Sat, 29 Nov 2008 04:29:09 -0500 (EST)
  • References: <ggofnk$rsh$1@smc.vnet.net> <ggon6q$1bt$1@smc.vnet.net>

On Nov 28, 1:12 pm, Jens-Peer Kuska <ku... at informatik.uni-leipzig.de>
wrote:
> Hi,
>
> Sum[Sqrt[n], {n, 1, 1000000000}]
>
> NSum[Sqrt[n], {n, 1, 1000000000}]  ??
>

I think the main point of the OP's question was that he wanted to add
the numbers one-by-one and see how the result depended on the
precision instead of using clever methods (that are built into Sum/
NSum) to get a precise result.



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