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MathGroup Archive 2003

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Re: simple equation system -- crashing M5?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg44295] Re: simple equation system -- crashing M5?
  • From: carlos at colorado.edu (Carlos Felippa)
  • Date: Tue, 4 Nov 2003 03:24:32 -0500 (EST)
  • References: <bo5sja$nk$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

"Rene Brueck" <nat at beldin.freeserve.co.uk> wrote in message news:<bo5sja$nk$1 at smc.vnet.net>...
> Quite frankly, I'm stymied ... the equation system below manages to fry
> Mathematica 5 on my system.
> It starts of (more or less) fine, using about 2.2GB ram, before---rather
> suddenly--Mathematica vanishes from the screen ... no error message, no
> Kernel shutdown, no output, no save ... ziltsch
>
> Has anyone had such an experience?? Any ideas??
>
> Here's the equation system:
>
> Solve[{M0 == (1 - f1 - f2 - f3 - f4 - f5 - f6 - f7 - f8 - f9 - f10 - f11 -
> f12 - f13 - f14 - f15 - f16)*m0,
>
> M1 == f1*m0 + (1 - f1 - f2 - f3 - f4 - f5 - f6 - f7 - f8 - f9 - f10 - f11 -
> f12 - f13 - f14 - f15 - f16)*m1,
>
> M2 == f1*m1 + f2*m0 + (1 - f1 - f2 - f3 - f4 - f5 - f6 - f7 - f8 - f9 -
> f10 - f11 - f12 - f13 - f14 - f15 - f16)*m2,
>
> M4 == f1*m3 + f2*m2 + f3*m1 + f4*m0,
>
> M5 == f2*m3 + f3*m2 + f4*m1 + f5*m0,
>
> M6== f3*m3 + f4*m2 + f5*m1 + f6*m0,
>
> M7== f4*m3 + f5*m2 + f6*m1+ f7*m0,
>
> M8== f5*m3 + f6*m2 + f7*m1+ f8*m0,
>
> M9== f6*m3 + f7*m2 + f8*m1+ f9*m0,
>
> M10== f7*m3 + f8*m2 + f9*m1+ f10*m0,
>
> M11 == f8*m3 + f9*m2 + f10*m1 + f11*m0,
>
> M12 == f9*m3 + f10*m2 + f11*m1 + f12*m0,
>
> M13== f10*m3 + f11*m2 + f12*m1 + f13*m0,
>
> M14== f11*m3 + f12*m2 + f13*m1+ f14*m0,
>
> M15== f12*m3 + f13*m2 + f14*m1+ f15*m0,
>
> M16== f13*m3 + f14*m2 + f15*m1+ f16*m0},
>
> {f1, f2, f3, f4, f5, f6, f7, f8, f9, f10, f11, f12, f13, f14, f15, f16}]

Seems to run forever on 4.2 also.  I killed it after 15 min.

~


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