Integrate in Mathematica 2.2 and 3.0
- To: mathgroup at smc.vnet.net
- Subject: [mg15360] Integrate in Mathematica 2.2 and 3.0
- From: pichon at leyla.u-strasbg.fr (Christophe Pichon)
- Date: Sat, 9 Jan 1999 23:58:19 -0500
- Organization: CRC - Universite Louis Pasteur - Strasbourg France
- Sender: owner-wri-mathgroup at wolfram.com
Hello Everyone
I am encountering the following problem
I had the function
int[c0_,c1_,c2_,a0_,a1_,a2_,a3_]=
Integrate[Sum[ ToExpression["a" <>ToString[i]]*
x^i,{i,0,3}] x /Sqrt[x^2-c0^2],{x,c1,c2}]//Simplify//Apart
defined in Mathematica 2.2
When I now run this notebook in Mathematica3 it hangs.
If I add
SetOption[Integrate,GenerateConditions->False, Assumptions->{c1>c0}]
I get an answer but it is formaly complex since it involves
sqrt(c0-c1) for instance. My quetion is : can I tell mathematica to
produce answers a la Mathematica 2.2 for Integrate ? If not how can I
tell Mathematica that I want a solution which is consistant formally
with c2>c1>c0>0 say (which Mathematica 2.2 was giving by default) ?
Cheers
Christophe
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Christophe Pichon
E-mail : pichon at iap.fr
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