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MathGroup Archive 2009

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problem with mathematica :(

  • To: mathgroup at smc.vnet.net
  • Subject: [mg98549] problem with mathematica :(
  • From: olfa <olfa.mraihi at yahoo.fr>
  • Date: Sun, 12 Apr 2009 03:48:31 -0400 (EDT)

Hi Mathematica community,
I have this system of equations:
 Reduce[{i >= iP, v + a*t/(1 - d) == vP + a*tP/(1 - d),
          t/d^(x/a) == tP/d^(xP/a), a*i + 1*x == a*iP + 1*xP,
          t/d^(i/-1) == tP/d^(iP/-1),
          z - c*x*(x - a)/(2*a) == zP - c*xP*(xP - a)/(2*a),iP==0},
{iP,tP,vP,xP,zP},Backsubstitution->True]
But mathematica still in running until I abort.Could you tell me what
is the problem?
Thank you.


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