Re: problem with mathematica :(
- To: mathgroup at smc.vnet.net
- Subject: [mg98561] Re: problem with mathematica :(
- From: Szabolcs Horvát <szhorvat at gmail.com>
- Date: Mon, 13 Apr 2009 03:31:10 -0400 (EDT)
- References: <grs6c7$qjg$1@smc.vnet.net>
olfa wrote:
> 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?
Remove the inequality unless you really need it. It makes the problem
much much more difficult.