Re: Big memory needed

*To*: mathgroup at smc.vnet.net*Subject*: [mg110155] Re: Big memory needed*From*: Adam Strzebonski <adams at wolfram.com>*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. The result contains 20 solutions and can be downloaded at http://members.wolfram.com/adams/MathGroupSolve.txt.gz (4 MB gzip-ed file, 235 MB after gunzip). Best Regards, Adam Strzebonski 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