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MathGroup Archive 2008

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Problem NSolve

  • To: mathgroup at smc.vnet.net
  • Subject: [mg90647] Problem NSolve
  • From: Jorge <jorgecerrillo at gmail.com>
  • Date: Thu, 17 Jul 2008 05:36:33 -0400 (EDT)
  • Organization: The Math Forum

Hello! To begin to ask for excuses you for my English poor level... I am a Spanish student of Chemical Engineering. Now I am employed at the simulation of a series of chemical reactions with Mathematica. 

As soon as I have programmed the problem to resolving, 23 equations with 23 variables, I use the function Nsolve, but the program returns to me the following message of mistake 

General::ivar: 0 is not a valid variable. >>

I have programmed my problem of the following form:

ecu{lhs1==0,lhs2=0,...,lhs23}
sol=Nsolve[ecu{var1,var2,...,var23}]


Might someone help?

Thank you very much! 
Jorge


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