Re : Reduce[] in version 5.1
- To: mathgroup at smc.vnet.net
- Subject: [mg52725] Re : [mg52678] Reduce[] in version 5.1
- From: "Jaccard Florian" <Florian.Jaccard at he-arc.ch>
- Date: Sat, 11 Dec 2004 05:21:20 -0500 (EST)
- Sender: owner-wri-mathgroup at wolfram.com
Hello !
Write :
In[9]:=
Reduce[{x^2 - y == 2, x + y == 0}, {x, y},
Backsubstitution -> True]
Out[9]=
x == -2 && y == 2 || x == 1 && y == -1
F.Jaccard
-----Message d'origine-----
De : Gianluca Gorni [mailto:gorni at dimi.uniud.it]
Envoyé : vendredi, 10. décembre 2004 02:22
À : mathgroup at smc.vnet.net
Objet : [mg52678] Reduce[] in version 5.1
Hello!
In Mathematica 5.1 I get the following result from Reduce:
Reduce[{x^2 - y == 2, x + y == 0}, {x, y}]
(x == -2 || x == 1) && y == -x
Sincerely, I preferred the output of version 4.2:
x==-2 && y==2 || x==1 && y==-1
To recover this good old form in 5.1 I have to Reduce[] twice:
Reduce[Reduce[{x^2 - y == 2, x + y == 0}, {x, y}]]
I think wri should work on this for the next version.
Best regards,
Gianluca Gorni