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MathGroup Archive 2005

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Re: true limit of mathematica ? Help me !!!

  • To: mathgroup at smc.vnet.net
  • Subject: [mg60234] Re: true limit of mathematica ? Help me !!!
  • From: Peter Pein <petsie at dordos.net>
  • Date: Thu, 8 Sep 2005 04:53:14 -0400 (EDT)
  • References: <dfm7o5$h9q$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

LumisROB schrieb:
> During this calculation:
>
>
> m= Table[(i-j)+3.*j^-4 +50*I,{I,1,10000},{j,1,10000}];
> Det[m]
>
>
> the kernel has jammed and the following message has been visualized
> No more memory available.
> Mathematica kernel has shut down.
>
> Is it possible to overcome this obstacle?
>
> The dimension of the in demand memory is not limited from windows xp
> or my hardware-software' configuratiion, in fact such error also
> happens in xp 64 Bit with Mathematica 5.2 (64 Bit) Athlon 64 2 GB Ram.
> Are these problems the true limit of mathematica ? =EF=BF=BD=EF=BF=BDor=
 Where am I
> being wrong?
>
> Thanks for the help
>
> Roberto R.
>
Hi Roberto,

1.) you must not use a constant (I) as iterator (i).
2.) Det[m]==0, because
   m[ni_, nj_] := Table[(i - j) + 3/j^4 + 50*I, {i, 1, ni}, {j, 1, nj}];
   Union[m[10000, 3] . {497, -2144, 1647}]

gives {0}.

Bye!
--
Peter Pein, Berlin
GnuPG Key ID: 0xA34C5A82
http://people.freenet.de/Peter_Berlin/



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