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MathGroup Archive 2005

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Re: NSum: badly missed Option

  • To: mathgroup at
  • Subject: [mg56853] Re: [mg56831] NSum: badly missed Option
  • From: Chris Chiasson <chris.chiasson at>
  • Date: Sat, 7 May 2005 15:35:14 -0400 (EDT)
  • References: <>
  • Reply-to: Chris Chiasson <chris.chiasson at>
  • Sender: owner-wri-mathgroup at

Try SetOptions on NIntegrate before the NSum call.

On 5/7/05, Alan <info at> wrote:
> I just had occasion to use NSum with a summation from n = 1 to Infinity.
> Works well except that I am getting this well-known complaint from
> NIntegrate (which is used in the summation method):
>      "NIntegrate::ncvb: NIntegrate failed to converge to prescribed accuracy
>      after 7 recursive bisections in x"
> The problem is that the usual fix for this, boosting MaxRecursion,
> can't be used because MaxRecursion is *not an option* for NSum.
> Shouldn't this standard NIntegrate option be available here?
> regards,
> alan

Chris Chiasson
1 (810) 265-3161

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