Re: Assumptions
- To: mathgroup at smc.vnet.net
- Subject: [mg9413] Re: Assumptions
- From: Paul Abbott <paul at physics.uwa.edu.au>
- Date: Wed, 5 Nov 1997 01:56:30 -0500
- Organization: University of Western Australia
- Sender: owner-wri-mathgroup at wolfram.com
Peter Jay Salzman wrote:
> I can't find any examples in the Mathematica help files of
> Assumption->{} being made when you use the 3.0 interface (when you
> actually have an integral sign instead of Integrate[]).
>
> If I want Mathematica to make assumptions about variables in
> integrating, am i forced to use the Integrate[] command, or is there a
> way of doing this with the integral symbol?
How about the global change
SetOptions[Integrate, Assumptions -> Re[n] > -1];
Then you can use the integral to compute, say,
Integrate[Exp[-t] t^n, {t, 0, Infinity}]
You can reset the options using
SetOptions[Integrate, Assumptions -> {}];
Cheers,
Paul
____________________________________________________________________
Paul Abbott Phone: +61-8-9380-2734
Department of Physics Fax: +61-8-9380-1014
The University of Western Australia Nedlands WA 6907
mailto:paul at physics.uwa.edu.au AUSTRALIA
http://www.pd.uwa.edu.au/~paul
God IS a weakly left-handed dice player
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