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Re: Incorrect Summation

  • To: mathgroup at smc.vnet.net
  • Subject: [mg129177] Re: Incorrect Summation
  • From: Murray Eisenberg <murray at math.umass.edu>
  • Date: Wed, 19 Dec 2012 05:01:19 -0500 (EST)
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What did you type, exactly, for Wolfram|Alpha? I tried several "obvious" things, e.g.,

  sum cos(log(log(k)))/log(k) for k from 2 to infinity

but WA was unable even to interpret it correct as asking for the sum of an infinite series.

On Dec 18, 2012, at 2:35 AM, amzoti <amzoti at gmail.com> wrote:

> Hi All,
>
> can someone try this and see if it returns an incorrect result?
>
> Sum[Cos[Log[Log[k]]]/Log[k],{k,2,Infinity}]
>
> I tried it on WA and believe the result is incorrect.
>
> Thanks.

---
Murray Eisenberg                                    murray at math.umass.edu
Mathematics & Statistics Dept.      
Lederle Graduate Research Tower            phone 413 549-1020 (H)
University of Massachusetts                               413 545-2838 (W)
710 North Pleasant Street                         fax   413 545-1801
Amherst, MA 01003-9305








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