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MathGroup Archive 2006

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RE: How to solve this system of equations in Mathematica

  • To: mathgroup at smc.vnet.net
  • Subject: [mg70392] RE: [mg70350] How to solve this system of equations in Mathematica
  • From: "David Park" <djmp at earthlink.net>
  • Date: Sun, 15 Oct 2006 00:19:04 -0400 (EDT)

Raj,

Could you present your equations again as a List of equations.

eqns = {eqn1, eqn2,...}

It is not clear what your equations are from your posting.

David Park
djmp at earthlink.net
http://home.earthlink.net/~djmp/ 

From: Raj [mailto:rajanikanth at gmail.com]
To: mathgroup at smc.vnet.net

Hi!

Could somebody tell me how to solve(numerically) this system of
equations in Mathematica for Di and De

0.135 == -0.34 Erf[0.0620537/Sqrt[De]]+0.34
Erfc[0.0340564/Sqrt[Di]]-0.34 Erfc[0.0368221/Sqrt[Di]]
0.0132 == -0.34 Erf[0.119209/Sqrt[De]]+0.34
Erfc[0.0654242/Sqrt[Di]]-0.34 Erfc[0.0707372/Sqrt[Di]]

I have tried using FindRoot, NSolve and Reduce but couldnt get a
solution which satisfies both equations.

Thanks,

Raj



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