Re: simple bug about Sum/Product function?
- To: mathgroup at smc.vnet.net
- Subject: [mg46777] Re: simple bug about Sum/Product function?
- From: "Dana DeLouis" <delouis at bellsouth.net>
- Date: Sun, 7 Mar 2004 01:34:04 -0500 (EST)
- Sender: owner-wri-mathgroup at wolfram.com
In version 5 for Windows, it works for me also up to 1,000,000. It
returns unevaluated for values over that.
Sum[2, {1000000}]
2000000
- -
Sum[2, {1000001}]
Sum[2, {1000001}]
- -
However, if I use NSum, I get a error no matter what the value.
NSum[2, {100}]
NSum::itraw : Raw object 100 cannot be used as an iteration.
- -
As others have mentioned, it works ok if the first item is not a "Raw
Object", but an iteration variable.
Sum[2, {i, 1000001}]
2000002
Dana
P.S. I have no idea why no error here though.
Remove[junk]
- -
Sum[2, {junk}]
Sum[2, {junk}]
- -
NSum[2, {junk}]
ComplexInfinity
"MATUDA Yuko" <matsuda.yuko at acm.org> wrote in message
news:c237r8$ie9$1 at smc.vnet.net...
> Hello there,
>
> Try the following simple expressions in Mathematica(ver5)
>
> Sum[1, {1000001}]
> Product[1, {1000001}]
>
> There are no problems in ver 4.2.
>
> Yuko MATSUDA