Re: Big memory needed

• To: mathgroup at smc.vnet.net
• Subject: [mg110155] Re: Big memory needed
• Date: Fri, 4 Jun 2010 08:03:13 -0400 (EDT)

Mathematica 8 (currently under development) will include
a major rewrite of the Solve command. Using the development
version of Mathematica, the computation takes 480 seconds
on a 4-core 2.8 GHz Xeon processor and uses 16 GB of RAM.

(4 MB gzip-ed file, 235 MB after gunzip).

Best Regards,

Wolfram Research

-------- Original Message --------
Subject: [mg110155]     [mg110141] Re: Big memory needed
Date:     Thu, 3 Jun 2010 05:41:21 -0400 (EDT)
From:     Stan Bischof <stan at newserve.worldbadminton.com>
To:     mathgroup at smc.vnet.net

Artur<grafix at csl.pl>  wrote:

>  Dear Mathematica Gurus,
>  I would like to ask somebody with big memory in computer (more than 4
>  GB) to help me in solution following equation:
>  Solve[{1/(2 p) (-c p^2 + b p^3 - p^6 + 2 c q + 3 p^4 q - 3 p^2 q^2 +
2 q^3 +
>        a^2 (-p^2 + q) - a (c - b p + 2 p^4 - 4 p^2 q + 3 q^2)) == d,
>   1/(4 p^2) (-c^2 + b^2 p^2 + a^2 p^4 + 2 a p^6 + p^8 -
>       2 b p^3 (a + p^2 - 2 q) - 4 a p^4 q - 4 p^6 q +
>       2 c (a + p^2 - q) q - a^2 q^2 - 2 a p^2 q^2 + 3 p^4 q^2 +
>       2 a q^3 + 2 p^2 q^3 - q^4) == e}, {p, q}]
>
>

well , 4 hours in it is at about 12GB process size and growing slowly.
Will be interesting to see where it tops out.

Stan

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