Services & Resources / Wolfram Forums
-----
 /
MathGroup Archive
2003
*January
*February
*March
*April
*May
*June
*July
*August
*September
*October
*November
*December
*Archive Index
*Ask about this page
*Print this page
*Give us feedback
*Sign up for the Wolfram Insider

MathGroup Archive 2003

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: simple equation system -- crashing M5?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg44297] Re: simple equation system -- crashing M5?
  • From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
  • Date: Tue, 4 Nov 2003 03:24:44 -0500 (EST)
  • Organization: Universitaet Leipzig
  • References: <bo5sja$nk$1@smc.vnet.net>
  • Reply-to: kuska at informatik.uni-leipzig.de
  • Sender: owner-wri-mathgroup at wolfram.com

Hi,

if you write down the Matrix equation you see that the
determinante of the matrix is about a half printed page
and for the solution I would expect a very huge expression
that over flow your memory.

However it is a bug that the kernel does not exit with an
out of memory mesage.

You may try to invert the matrix and solve the linear
equations by hand.

Regards
  Jens


Rene Brueck wrote:
>
> 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}]



  • Prev by Date: RE: New Plot output in version 5
  • Next by Date: Re: Integrate 5.0
  • Previous by thread: Re: simple equation system -- crashing M5?
  • Next by thread: Re: simple equation system -- crashing M5?