Re: What is causing this error message?

*To*: mathgroup at smc.vnet.net*Subject*: [mg57549] Re: [mg57537] What is causing this error message?*From*: "Jaccard Florian" <Florian.Jaccard at he-arc.ch>*Date*: Wed, 1 Jun 2005 06:01:33 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

Hello ! == , not = x*y, not xy So , NSolve[{(x^3)*y + x*y - 10 == 0, x*y^2 - x*y + 6 == 0}, {x, y}] Would be the correct input. Maybe you would also be interested in : Reduce[{(x^3)*y + X*y - 10 == 0, x*y^2 - x*y + 6 == 0}, {x, y}, Reals, Backsubstitution -> True] // N Regards F.Jaccard -----Message d'origine----- De : Bookreader [mailto:bookreader127 at yahoo.com] Envoyé : mardi, 31. mai 2005 11:01 À : mathgroup at smc.vnet.net Objet : [mg57537] What is causing this error message? NSolve[{x^3y + xy - 10 = 0, xy^2 - xy + 6 = 0}, {x, y}] Set::write: Tag Plus in -10 + x y + x^3 y is Protected. More... Please tell me how to correct this. Thanks.