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Re: Simplify and Memory

  • To: mathgroup at
  • Subject: [mg58231] Re: Simplify and Memory
  • From: "Jens-Peer Kuska" <kuska at>
  • Date: Fri, 24 Jun 2005 02:49:50 -0400 (EDT)
  • Organization: Uni Leipzig
  • References: <d9e0cq$g6v$>
  • Sender: owner-wri-mathgroup at



may help you


"Geraud" <nospam at nospam.nospam> schrieb im 
Newsbeitrag news:d9e0cq$g6v$1 at
> Hi Group
> I have a list of complicated expressions 
> ExprList={expr1,expr2,...} and
> I try to (Full)Simplify them.
> If I apply (Full)Simplify to ExprList or to each 
> of the expressions
> inside (in a Do[] loop), the kernel goes out of 
> memory (2 GB PIV computer).
> However if I save the expressions in a file and 
> I simplify each
> expression one after the other, quitting the 
> kernel at each step, it works.
> It seems that Mathematica keeps in memory a lot 
> of information about
> past simplification processes. It is useful for 
> saving time (try to
> simplify two similar expressions), but very 
> expensive as far as memory
> is concerned.
> "Clear[Out]" or "Share[expr]" at each step does 
> not help.
> How can I delete the memory associated with 
> Simplify at each step,
> rather than quitting the kernel and doing the 
> loop by hand ?
> Thanks a lot.
> G.

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