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MathGroup Archive 2004

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Re: long evaluation time

  • To: mathgroup at smc.vnet.net
  • Subject: [mg51220] Re: [mg51208] long evaluation time
  • From: DrBob <drbob at bigfoot.com>
  • Date: Sat, 9 Oct 2004 04:18:33 -0400 (EDT)
  • References: <200410080655.CAA25000@smc.vnet.net>
  • Reply-to: drbob at bigfoot.com
  • Sender: owner-wri-mathgroup at wolfram.com

Because Minimize isn't evaluating it at all (I think). It's lost in never-never land.

Timing[NMinimize[
    {(x + x^2)/(1 + y^2) +
      (y + y^2)/(1 + z^2) +
      (z + z^2)/(1 + x^2),
     x > 0 && y > 0 && z > 0},
    {x, y, z}]]
{0.046999999999997044*Second,
   {0., {x -> 0., y -> 0., z -> 0.}}}

Bobby

On Fri, 8 Oct 2004 02:55:02 -0400 (EDT), _n3g <math.online at gmx.net> wrote:

> Hi everybody!
>
> Can anyone explain me, why it takes so long to evaluate
>
> Minimize[
>
> (x + x^2)/(1 + y^2) + (y + y^2)/(1 + z^2) + (z + z^2)/(1 + x^2),
>
> x > 0 && y > 0 && z > 0,
>
> {x,y,z}
>
> ]
>
> ?
>
> thx, _n3g
>
>
>
>



-- 
DrBob at bigfoot.com
www.eclecticdreams.net


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