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Re: Summation problem

• To: mathgroup at smc.vnet.net
• Subject: [mg56666] Re: Summation problem
• From: dh <dh at metrohm.ch>
• Date: Tue, 3 May 2005 05:26:18 -0400 (EDT)
• References: <d4v6br$nq9$1@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

Hi,
this problem did not exist in version 4.
It is new in version 5.
Therefore,I think WRI should comment on this.
(Daniel Lichtblau, please  excuse me for picking you, but I just had 
your address around.)
Sincerely, Daniel (..Huber)

jaropis wrote:
> Why can't Mathematica sum:
> Sum[I^n/n,{n,1,Infinity}]
> and gives the (incorrect) answer, that this is divergent while it can do:
> Sum[I^(n+1)/n,{n,1,Infinity}]
> correctly? 
> 
> Jaroslaw Piskorski
>