Re: Strange "not a symbol or valid symbol name" error
- To: mathgroup at smc.vnet.net
- Subject: [mg60222] Re: Strange "not a symbol or valid symbol name" error
- From: "Jens-Peer Kuska" <kuska at informatik.uni-leipzig.de>
- Date: Thu, 8 Sep 2005 04:52:59 -0400 (EDT)
- Organization: Uni Leipzig
- References: <dfm86d$hek$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Hi,
try
x=.;
Integrate[E^(-x) Sqrt[x^2-9], {x,3,5}]
but Mathematica can't do the integral.
Regards
Jens
"Flip" <fliptomato at gmail.com> schrieb im
Newsbeitrag news:dfm86d$hek$1 at smc.vnet.net...
| Greetings all, I'm using Mathematica 5.0 and
have been getting a
| strange error message:
|
| Unique::usym :
| 10000000000 is not a symbol or a valid symbol
name
|
| This comes from the following integral:
|
| Integrate[E^(-x) Sqrt[x^2-9], {x,3,5}]
|
| The limits of integration don't matter much so
long as they keep the
| integrand real.
|
| I don't understand this and am not quite sure
how to fix the problem.
| (It's a well defined definite integral, right?
It's real in the domain
| of integration and nondivergent.)
|
| Thanks,
| Flip
|