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