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MathGroup Archive 2005

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Re: FullSimplify and out of memory

  • To: mathgroup at smc.vnet.net
  • Subject: [mg54026] Re: FullSimplify and out of memory
  • From: "Jens-Peer Kuska" <kuska at informatik.uni-leipzig.de>
  • Date: Tue, 8 Feb 2005 05:31:01 -0500 (EST)
  • Organization: Uni Leipzig
  • References: <cu202p$lvn$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Hi,

a) under Windows XP your application can't have more than ca 3.5 GByte
   so it is useless to have 200 GByte swap for a single application

b) try to simplify single terms instead of the full expression, i.e.,
   the summands of a sum or the factors of a product.

Regards
  Jens

"Toshiyuki (Toshi) Meshii" <meshii at mech.fukui-u.ac.jp> schrieb im 
Newsbeitrag news:cu202p$lvn$1 at smc.vnet.net...
> Hello,
>
> I am having trouble with FullSimplify.
> When I try FullSimplify for an equation that includes Exp, Sin, Cos, Sinh
> and Cosh, system becomes very busy and finally kernel is terminated with a
> message "out of memory."
> The only application running is the Mathematica.
> The variables I am handling are all real.
> Does some one have any good idea for my trouble?
>
> (In my feeling, Simplify with Math v2.2 on Win3.1was slow but working well
> and could obtain simplified results.)
>
> I am running Mathematica v.5.0.1 on WinXP pro SP-2.
> CPU: Pen4 3.2GHz
> RAM: 2.0 GB
> HDD: 80GB (primary), 250 GB(secondary, 200 GB specified as virtual memory)
>
> -Toshi
> 



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