Re: Re: NSum: badly missed Option
- To: mathgroup at smc.vnet.net
- Subject: [mg56974] Re: [mg56938] Re: NSum: badly missed Option
- From: yehuda ben-shimol <bsyehuda at gmail.com>
- Date: Wed, 11 May 2005 05:25:20 -0400 (EDT)
- References: <200505070816.EAA20223@smc.vnet.net> <d5j5ob$qf3$1@smc.vnet.net> <d5kb13$2at$1@smc.vnet.net> <200505100743.DAA08420@smc.vnet.net>
- Reply-to: yehuda ben-shimol <bsyehuda at gmail.com>
- Sender: owner-wri-mathgroup at wolfram.com
A short remark In the exampls it shoud be x^20 and not x20 in order to repeat the results yehuda On 5/10/05, antononcube <antononcube at gmail.com> wrote: > Alan wrote: > > "Chris Chiasson" <chris.chiasson at gmail.com> wrote in message > > news:d5j5ob$qf3$1 at smc.vnet.net... > > > Try SetOptions on NIntegrate before the NSum call. > > > > Excellent. Thanks for the solution! > > > > regards, > > alan > > Nested Method option can be used in NSum. > > For example: > > In[1]:= NSum[1/(x20*Sin[x]^2), {x, 2, Infinity}, Method -> NIntegrate] > > NIntegrate::ncvb: > NIntegrate failed to converge to prescribed accuracy after 7 > recursive bisections in x near x = 18.8764. > > Out[1]= 1.16782 10^-6 > > In[2]:= NSum[1/(x20*Sin[x]^2), {x, 1, Infinity}, Method -> {NIntegrate, > MaxRecursion -> 100}] > > NIntegrate::slwcon: > Numerical integration converging too slowly; suspect one of the > following: > singularity, value of the integration being 0, oscillatory > integrand, or > insufficient WorkingPrecision. If your integrand is oscillatory try > using > the option Method->Oscillatory in NIntegrate. > > Out[2]= 1.41228 > > Anton Antonov > Wolfram Research, Inc. > >
- References:
- NSum: badly missed Option
- From: "Alan" <info@optioncity.REMOVETHIS.net>
- Re: NSum: badly missed Option
- From: "antononcube" <antononcube@gmail.com>
- NSum: badly missed Option